Bump com.diffplug.spotless:spotless-maven-plugin from 2.38.0 to 2.39.0

Bumps [com.diffplug.spotless:spotless-maven-plugin](https://github.com/diffplug/spotless) from 2.38.0 to 2.39.0.
- [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md)
- [Commits](diffplug/spotless@lib/2.38.0...lib/2.39.0)

---
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] <[email protected]>

pom.xml

@@ -116,7 +116,7 @@
         <maven.plugin.release.version>2.5.3</maven.plugin.release.version>
         <maven.plugin.shade.version>3.5.0</maven.plugin.shade.version>
         <maven.plugin.source.version>3.3.0</maven.plugin.source.version>
-        <maven.plugin.spotless.version>2.38.0</maven.plugin.spotless.version>
+        <maven.plugin.spotless.version>2.39.0</maven.plugin.spotless.version>
         <milo.version>0.6.10</milo.version>
         <mockito.version>5.5.0</mockito.version>
         <moquette.version>0.15.2</moquette.version>