deps: bump com.diffplug.spotless:spotless-maven-plugin

Bumps [com.diffplug.spotless:spotless-maven-plugin](https://github.com/diffplug/spotless) from 3.1.0 to 3.2.0.
- [Release notes](https://github.com/diffplug/spotless/releases)
- [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md)
- [Commits](diffplug/spotless@lib/3.1.0...lib/3.2.0)

---
updated-dependencies:
- dependency-name: com.diffplug.spotless:spotless-maven-plugin
  dependency-version: 3.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

build/build-parent/pom.xml

@@ -51,7 +51,7 @@
     <version.revapi.plugin>0.15.1</version.revapi.plugin>
     <version.sonar.plugin>5.5.0.6356</version.sonar.plugin>
     <version.source.plugin>3.4.0</version.source.plugin>
-    <version.spotless.plugin>3.1.0</version.spotless.plugin>
+    <version.spotless.plugin>3.2.0</version.spotless.plugin>
     <version.surefire.plugin>3.5.4</version.surefire.plugin>
     <version.versions.plugin>2.21.0</version.versions.plugin>