Bump the maven group with 7 updates

Bumps the maven group with 7 updates:

| Package | From | To |
| --- | --- | --- |
| [org.jetbrains.kotlin:kotlin-stdlib](https://github.com/JetBrains/kotlin) | `2.0.20` | `2.0.21` |
| [org.jetbrains.kotlin:kotlin-reflect](https://github.com/JetBrains/kotlin) | `2.0.20` | `2.0.21` |
| [org.jetbrains.kotlin:kotlin-serialization](https://github.com/JetBrains/kotlin) | `2.0.20` | `2.0.21` |
| org.jetbrains.kotlin:kotlin-maven-noarg | `2.0.20` | `2.0.21` |
| org.jetbrains.kotlin:kotlin-maven-allopen | `2.0.20` | `2.0.21` |
| org.jetbrains.kotlin:kotlin-maven-plugin | `2.0.20` | `2.0.21` |
| org.jetbrains.kotlin:kotlin-maven-serialization | `2.0.20` | `2.0.21` |


Updates `org.jetbrains.kotlin:kotlin-stdlib` from 2.0.20 to 2.0.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v2.0.21/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.0.20...v2.0.21)

Updates `org.jetbrains.kotlin:kotlin-reflect` from 2.0.20 to 2.0.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v2.0.21/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.0.20...v2.0.21)

Updates `org.jetbrains.kotlin:kotlin-serialization` from 2.0.20 to 2.0.21
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v2.0.21/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.0.20...v2.0.21)

Updates `org.jetbrains.kotlin:kotlin-maven-noarg` from 2.0.20 to 2.0.21

Updates `org.jetbrains.kotlin:kotlin-maven-allopen` from 2.0.20 to 2.0.21

Updates `org.jetbrains.kotlin:kotlin-maven-plugin` from 2.0.20 to 2.0.21

Updates `org.jetbrains.kotlin:kotlin-maven-serialization` from 2.0.20 to 2.0.21

Updates `org.jetbrains.kotlin:kotlin-maven-allopen` from 2.0.20 to 2.0.21

Updates `org.jetbrains.kotlin:kotlin-maven-plugin` from 2.0.20 to 2.0.21

Updates `org.jetbrains.kotlin:kotlin-maven-serialization` from 2.0.20 to 2.0.21

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-stdlib
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: maven
- dependency-name: org.jetbrains.kotlin:kotlin-reflect
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: maven
- dependency-name: org.jetbrains.kotlin:kotlin-serialization
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: maven
- dependency-name: org.jetbrains.kotlin:kotlin-maven-noarg
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: maven
- dependency-name: org.jetbrains.kotlin:kotlin-maven-allopen
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: maven
- dependency-name: org.jetbrains.kotlin:kotlin-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: maven
- dependency-name: org.jetbrains.kotlin:kotlin-maven-serialization
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: maven
- dependency-name: org.jetbrains.kotlin:kotlin-maven-allopen
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: maven
- dependency-name: org.jetbrains.kotlin:kotlin-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: maven
- dependency-name: org.jetbrains.kotlin:kotlin-maven-serialization
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: maven
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -22,7 +22,7 @@
         <maven.compiler.target>${java.version}</maven.compiler.target>
         <maven-surefire-plugin.version>3.5.1</maven-surefire-plugin.version>
         <maven-failsafe-plugin.version>3.5.1</maven-failsafe-plugin.version>
-        <kotlin.version>2.0.20</kotlin.version>
+        <kotlin.version>2.0.21</kotlin.version>
 
         <spring-boot.version>3.3.4</spring-boot.version>