Bump checkstyle from 9.0.1 to 9.1 (#290)

Bumps [checkstyle](https://github.com/checkstyle/checkstyle) from 9.0.1 to 9.1.
- [Release notes](https://github.com/checkstyle/checkstyle/releases)
- [Commits](checkstyle/checkstyle@checkstyle-9.0.1...checkstyle-9.1)

---
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]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pom.xml

@@ -86,7 +86,7 @@
 
         <!-- Dependency versions -->
         <dependency.apache-commons.version>3.12.0</dependency.apache-commons.version>
-        <dependency.checkstyle.version>9.0.1</dependency.checkstyle.version>
+        <dependency.checkstyle.version>9.1</dependency.checkstyle.version>
         <dependency.slfj.version>1.7.32</dependency.slfj.version>
         <dependency.servlet-api.version>4.0.1</dependency.servlet-api.version>
         <dependency.play.version>2.8.8</dependency.play.version>