Versions: Bump the kotlin group with 3 updates

Bumps the kotlin group with 3 updates: [org.jetbrains.kotlin:kotlin-gradle-plugin](https://github.com/JetBrains/kotlin), [com.google.devtools.ksp:symbol-processing-api](https://github.com/google/ksp) and [com.google.devtools.ksp:com.google.devtools.ksp.gradle.plugin](https://github.com/google/ksp).


Updates `org.jetbrains.kotlin:kotlin-gradle-plugin` 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)

Updates `com.google.devtools.ksp:symbol-processing-api` from 1.9.10-1.0.13 to 1.9.20-1.0.14
- [Release notes](https://github.com/google/ksp/releases)
- [Commits](google/ksp@1.9.10-1.0.13...1.9.20-1.0.14)

Updates `com.google.devtools.ksp:com.google.devtools.ksp.gradle.plugin` from 1.9.10-1.0.13 to 1.9.20-1.0.14
- [Release notes](https://github.com/google/ksp/releases)
- [Commits](google/ksp@1.9.10-1.0.13...1.9.20-1.0.14)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin:kotlin-gradle-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: kotlin
- dependency-name: com.google.devtools.ksp:symbol-processing-api
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: kotlin
- dependency-name: com.google.devtools.ksp:com.google.devtools.ksp.gradle.plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: kotlin
...

Signed-off-by: dependabot[bot] <support@github.com>

gradle/libs.versions.toml

@@ -1,9 +1,9 @@
 [versions]
 
 # Kotlin version used to build Yatagan
-kotlin = "1.9.10"
+kotlin = "1.9.20"
 # Must be in sync with 'kotlin'. Asserted in buildscript
-ksp = "1.9.10-1.0.13"
+ksp = "1.9.20-1.0.14"
 # Must be compatible with 'kotlin'
 dokka = "1.9.10"