Bump org.jetbrains.kotlin:kotlin-gradle-plugin from 1.9.21 to 1.9.23

Bumps [org.jetbrains.kotlin:kotlin-gradle-plugin](https://github.com/JetBrains/kotlin) from 1.9.21 to 1.9.23.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v1.9.23/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.9.21...v1.9.23)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-gradle-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

picocli-examples/build.gradle

@@ -6,7 +6,7 @@ buildscript {
     }
 
     dependencies {
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.9.21"
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.9.23"
     }
 }