Bump the kotlin group with 2 updates (#2015)

Bumps the kotlin group with 2 updates: [org.jetbrains.kotlin:kotlin-stdlib](https://github.com/JetBrains/kotlin) and org.jetbrains.kotlin:kotlin-maven-plugin.


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-maven-plugin` from 2.0.20 to 2.0.21

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

extension-jaxrs/pom.xml

@@ -71,7 +71,7 @@
         <dependency>
             <groupId>org.jetbrains.kotlin</groupId>
             <artifactId>kotlin-stdlib</artifactId>
-            <version>2.0.20</version>
+            <version>2.0.21</version>
             <scope>test</scope>
         </dependency>
         <dependency>

testsuite/data/pom.xml

@@ -14,7 +14,7 @@
 
     <properties>
         <eclipse.microprofile.openapi.version>4.0</eclipse.microprofile.openapi.version>
-        <kotlin.version>2.0.20</kotlin.version>
+        <kotlin.version>2.0.21</kotlin.version>
         <java.version>17</java.version>
         <maven.compiler.source>${java.version}</maven.compiler.source>
         <maven.compiler.target>${java.version}</maven.compiler.target>