Bump spotless-maven-plugin from 2.28.0 to 2.30.0

Bumps [spotless-maven-plugin](https://github.com/diffplug/spotless) from 2.28.0 to 2.30.0.
- [Release notes](https://github.com/diffplug/spotless/releases)
- [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md)
- [Commits](diffplug/spotless@lib/2.28.0...lib/2.30.0)

---
updated-dependencies:
- dependency-name: com.diffplug.spotless:spotless-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -376,6 +376,6 @@
         <javax.ws.rs-api-version>2.1.1</javax.ws.rs-api-version>
         <jsr311-api-version>1.1.1</jsr311-api-version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <spotless.version>2.28.0</spotless.version>
+        <spotless.version>2.30.0</spotless.version>
     </properties>
 </project>