Bump kotlin-gradle-plugin from 1.6.10 to 1.6.20
Bump kotlin-gradle-plugin from 1.6.10 to 1.6.20

Bumps [kotlin-gradle-plugin](https://github.com/JetBrains/kotlin) from 1.6.10 to 1.6.20.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v1.6.20/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/compare/v1.6.10...v1.6.20)

---
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] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
freefair/gradle-plugins,freefair/gradle-plugins