fix(deps): update kotlin monorepo to v2.4.21

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
org.jetbrains.kotlin:kotlin-metadata-jvm (source)	2.4.20 → 2.4.21
org.jetbrains.kotlin:kotlin-gradle-plugin (source)	2.4.20 → 2.4.21

---

Release Notes

JetBrains/kotlin (org.jetbrains.kotlin:kotlin-metadata-jvm)

v2.4.21

Backend. Wasm

• KT-89267 K/Wasm: calling a (T) -> R lambda with an argument that isn't a T traps instead of throwing ClassCastException

JVM. Reflection

• KT-89280 NoSuchElementException in argumentsMakeSenseOnlyForMutableContainer for Java non-static inner class of generic outer class
• KT-80710 Reflection: change KCallable representation to avoid dependency on K1

JavaScript

• KT-89449 Kotlin/JS: Member names no longer minified in production
• KT-89363 KJS. Regular class with companion can't extend external class

Tools. Compiler plugins. Serialization

• KT-89275 Kotlin/Wasm: Invalid Wasm is emitted for a @Serializable generic class with a class upper bound

Tools. Gradle. Native

• KT-89285 SwiftPM import results in flooded log
• KT-86251 K/N: Flaky linkDebugTestLinuxX64 failure with "truncated or malformed archive" on libstdlib-cache.a

Tools. Scripts

• KT-89247 Kotlin Script: NoClassDefFoundError on 2nd execution with transitive dependency from imported script
• KT-89220 JSR-223: generic Java bindings break all subsequent eval() calls
• KT-88458 Audit closeable resource usage
• KT-88453 VirtualFileScriptSource.text leaks an unclosed file stream — script source file handle held until GC, blocks file deletion on Windows

---

Configuration

📅 Schedule: (in timezone Europe/Berlin)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: build.gradle

Command failed: ./gradlew -Dorg.gradle.jvmargs=-Xms512m -Xmx512m --console=plain --dependency-verification lenient -q --write-verification-metadata sha256,pgp dependencies

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.
-----------
* What went wrong:
A problem occurred configuring root project 'notes-android'.
> Could not resolve all artifacts for configuration 'classpath'.
   > Could not resolve com.android.tools.build:gradle:9.4.1.
     Required by:
         buildscript of root project 'notes-android'
      > Repository MavenRepo is disabled due to earlier error below:
         > Could not resolve com.android.tools.build:gradle:9.4.1.
            > Could not get resource 'https://repo.maven.apache.org/maven2/com/android/tools/build/gradle/9.4.1/gradle-9.4.1.pom'.
               > Could not GET 'https://repo.maven.apache.org/maven2/com/android/tools/build/gradle/9.4.1/gradle-9.4.1.pom'.
                  > Received status code 429 from server: Too Many Requests
> There is 1 more failure with an identical cause.

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights from a Build Scan (powered by Develocity).
> Get more help at https://help.gradle.org.
==============================================================================

2: Task failed with an exception.
-----------
* What went wrong:
A problem occurred configuring root project 'notes-android'.
> Could not resolve all artifacts for configuration 'classpath'.
   > Could not resolve com.android.tools.build:gradle:9.4.1.
     Required by:
         buildscript of root project 'notes-android'
      > Repository MavenRepo is disabled due to earlier error below:
         > Could not resolve com.android.tools.build:gradle:9.4.1.
            > Could not get resource 'https://repo.maven.apache.org/maven2/com/android/tools/build/gradle/9.4.1/gradle-9.4.1.pom'.
               > Could not GET 'https://repo.maven.apache.org/maven2/com/android/tools/build/gradle/9.4.1/gradle-9.4.1.pom'.
                  > Received status code 429 from server: Too Many Requests
> There is 1 more failure with an identical cause.

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights from a Build Scan (powered by Develocity).
> Get more help at https://help.gradle.org.
==============================================================================

BUILD FAILED in 29s

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

View in Codacy

_{NEW Get contextual insights on your PRs based on Codacy's metrics, along with PR and Jira context, without leaving GitHub. Enable AI reviewer
TIP This summary will be updated as you push new changes.}

[github-actions]

APK file: https://github.com/nextcloud/notes-android/actions/runs/37905519542/artifacts/11604049897
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)