Bump com.puppycrawl.tools:checkstyle from 10.18.1 to 10.20.0

Bumps [com.puppycrawl.tools:checkstyle](https://github.com/checkstyle/checkstyle) from 10.18.1 to 10.20.0.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](checkstyle/checkstyle@checkstyle-10.18.1...checkstyle-10.20.0)

---
updated-dependencies:
- dependency-name: com.puppycrawl.tools:checkstyle
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

gradle/libs.versions.toml

@@ -6,7 +6,7 @@ com-github-ben-manes-versions-plugin = "0.51.0"
 com-github-spotbugs = "4.8.6"
 com-google-code-findbugs = "3.0.1"
 com-h3xstream-findsecbugs-findsecbugs-plugin = "1.13.0"
-com-puppycrawl-tools-checkstyle = "10.18.1"
+com-puppycrawl-tools-checkstyle = "10.20.0"
 nl-littlerobots-version-catalog-update-plugin = "0.8.4"
 org-assertj = "3.26.3"
 org-gaul-modernizer = "2.9.0"