Bump gradle.ext.kotlinVersion from 1.9.10 to 1.9.21

Bumps `gradle.ext.kotlinVersion` from 1.9.10 to 1.9.21.

Updates `org.jetbrains.kotlin.android` from 1.9.10 to 1.9.21

Updates `org.jetbrains.kotlin.jvm` from 1.9.10 to 1.9.21

Updates `org.jetbrains.kotlin.kapt` from 1.9.10 to 1.9.21

Updates `org.jetbrains.kotlin.plugin.serialization` from 1.9.10 to 1.9.21

Updates `org.jetbrains.kotlin.plugin.parcelize` from 1.9.10 to 1.9.21

Updates `org.jetbrains.kotlin.plugin.allopen` from 1.9.10 to 1.9.21

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin.android
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin.jvm
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin.kapt
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin.plugin.serialization
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin.plugin.parcelize
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.jetbrains.kotlin.plugin.allopen
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

settings.gradle

@@ -1,5 +1,5 @@
 pluginManagement {
-    gradle.ext.kotlinVersion = '1.9.10'
+    gradle.ext.kotlinVersion = '1.9.21'
     gradle.ext.agpVersion = '8.1.0'
     gradle.ext.googleServicesVersion = '4.3.15'
     gradle.ext.navigationVersion = '2.5.3'