Bump org.jetbrains.kotlin:kotlin-gradle-plugin from 1.9.10 to 1.9.20

Bumps [org.jetbrains.kotlin:kotlin-gradle-plugin](https://github.com/JetBrains/kotlin) from 1.9.10 to 1.9.20.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.9.10...v1.9.20)

---
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] <support@github.com>

build.gradle.kts

@@ -19,7 +19,7 @@ ktlint {
 }
 
 dependencies {
-    compileOnly("org.jetbrains.kotlin:kotlin-gradle-plugin:1.9.10")
+    compileOnly("org.jetbrains.kotlin:kotlin-gradle-plugin:1.9.20")
     testImplementation("org.assertj:assertj-core:3.24.2")
     testImplementation("org.junit.jupiter:junit-jupiter-api:5.10.0")
     testImplementation("org.junit.jupiter:junit-jupiter-params:5.10.1")