chore(deps): update kotlin to v2.2.21 (#528)

Author: renovate[bot]

gradle/libs.versions.toml

@@ -28,7 +28,7 @@ test-androidx-rules = "1.7.0"
 androidx-tracing = "1.3.0"
 uiautomator = "2.3.0"
 okhttp3 = "5.2.1"
-kotlin = "2.2.20"
+kotlin = "2.2.21"
 plugin-oss-licenses = "0.10.9"
 ktlint = "13.1.0"
 detekt = "1.23.8"