chore(deps): bump kapt from 1.9.20-Beta2 to 1.9.20-RC

Bumps [kapt](https://github.com/JetBrains/kotlin) from 1.9.20-Beta2 to 1.9.20-RC.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](https://github.com/JetBrains/kotlin/commits)

---
updated-dependencies:
- dependency-name: kapt
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

tools/plugin/gradle-plugin/build.gradle.kts

@@ -15,7 +15,7 @@ import java.util.Properties
 
 plugins {
     java
-    kotlin("kapt") version "1.9.20-Beta2" apply false
+    kotlin("kapt") version "1.9.20-RC" apply false
     alias(libs.plugins.ksp) apply false
     alias(libs.plugins.kover)
     alias(libs.plugins.detekt)