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

Bumps [com.diffplug.spotless:spotless-maven-plugin](https://github.com/diffplug/spotless) from 2.37.0 to 2.39.0.
- [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md)
- [Commits](diffplug/spotless@lib/2.37.0...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>

pom.xml

@@ -122,7 +122,7 @@ limitations under the License.
         <sonar.java.source>${java.version}</sonar.java.source>
         <sonar.language>java</sonar.language>
         <license.header.file>${project.basedir}/license-header</license.header.file>
-        <spotless.version>2.37.0</spotless.version>
+        <spotless.version>2.39.0</spotless.version>
         <maven-assembly-plugin.version>3.6.0</maven-assembly-plugin.version>
     </properties>