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] <support@github.com>

pom.xml

@@ -341,7 +341,7 @@ limitations under the License.
     <plexusDistMgmtSnapshotsUrl>https://oss.sonatype.org/content/repositories/plexus-snapshots</plexusDistMgmtSnapshotsUrl>
     <project.build.outputTimestamp>2023-07-23T09:58:29Z</project.build.outputTimestamp>
     <gpg.useagent>true</gpg.useagent>
-    <spotless-maven-plugin.version>2.38.0</spotless-maven-plugin.version>
+    <spotless-maven-plugin.version>2.39.0</spotless-maven-plugin.version>
     <mavenPluginToolsVersion>3.9.0</mavenPluginToolsVersion>
     <mavenFluidoSkinVersion>1.11.2</mavenFluidoSkinVersion>
     <mavenSurefireVersion>3.1.2</mavenSurefireVersion>