build(deps): bump com.diffplug.spotless:spotless-maven-plugin (#257)

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

pom.xml

@@ -52,7 +52,7 @@
   <org.hamcrest.version>2.2</org.hamcrest.version>
   <org.mockito.version>5.2.0</org.mockito.version>
   <org.jacoco.maven.plugin.version>0.8.10</org.jacoco.maven.plugin.version>
-  <com.diffplug.spotless.maven.plugin.version>2.38.0</com.diffplug.spotless.maven.plugin.version>
+  <com.diffplug.spotless.maven.plugin.version>2.39.0</com.diffplug.spotless.maven.plugin.version>
   <org.slf4j.version>2.0.7</org.slf4j.version>
 </properties>