Bump com.diffplug.spotless:spotless-maven-plugin from 3.0.0 to 3.2.1

Bumps [com.diffplug.spotless:spotless-maven-plugin](https://github.com/diffplug/spotless) from 3.0.0 to 3.2.1.
- [Release notes](https://github.com/diffplug/spotless/releases)
- [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md)
- [Commits](diffplug/spotless@lib/3.0.0...maven/3.2.1)

---
updated-dependencies:
- dependency-name: com.diffplug.spotless:spotless-maven-plugin
  dependency-version: 3.2.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -26,7 +26,7 @@
     <dependency-plugin.version>3.9.0</dependency-plugin.version>
     <release-plugin.version>3.2.0</release-plugin.version>
     <surefire-plugin.version>3.5.4</surefire-plugin.version>
-    <spotless.version>3.0.0</spotless.version>
+    <spotless.version>3.2.1</spotless.version>
     <license-plugin.version>2.7.0</license-plugin.version>
     <java.version>21</java.version>
     <maven.compiler.release>${java.version}</maven.compiler.release>