Bump org.jetbrains.kotlin:kotlin-gradle-plugin from 1.6.20 to 1.9.22

Bumps [org.jetbrains.kotlin:kotlin-gradle-plugin](https://github.com/JetBrains/kotlin) from 1.6.20 to 1.9.22.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v1.6.20...v1.9.22)

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

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

build.gradle

@@ -5,7 +5,7 @@ buildscript {
     }
 
     dependencies {
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.20"
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.9.22"
         classpath "com.google.cloud.tools:appengine-gradle-plugin:2.4.4"
         classpath "com.github.jengelman.gradle.plugins:shadow:6.1.0"
     }