chore(deps): update com.puppycrawl.tools:checkstyle to v10.21.2

Author: renovate[bot]

gradle/libs.versions.toml

@@ -30,7 +30,7 @@ annotations = "26.0.1"
 # Build
 indra = "3.1.3"
 test-logger = "4.0.0"
-checkstyle = "10.18.1"
+checkstyle = "10.21.2"
 errorprone = "2.31.0"
 errorprone-plugin = "4.1.0"
 nullaway = "0.11.2"