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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -2,7 +2,7 @@
 assertj="3.26.3"
 autoValue="1.11.0"
 checkerQual="3.47.0"
-checkstyle="10.20.2"
+checkstyle="10.21.2"
 geantyref = "1.3.16"
 errorprone="2.27.1"
 indra = "3.1.3"