build(deps-dev): bump com.diffplug.spotless:spotless-maven-plugin (#25)

Bumps [com.diffplug.spotless:spotless-maven-plugin](https://github.com/diffplug/spotless) from 3.9.0 to 3.10.0.
- [Release notes](https://github.com/diffplug/spotless/releases)
- [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md)
- [Commits](diffplug/spotless@maven/3.9.0...maven/3.10.0)

---
updated-dependencies:
- dependency-name: com.diffplug.spotless:spotless-maven-plugin
  dependency-version: 3.10.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

pom.xml

@@ -54,7 +54,7 @@
         <maven-surefire-plugin.version>3.6.0-M1</maven-surefire-plugin.version>
         <sortpom-maven-plugin.version>4.0.0</sortpom-maven-plugin.version>
         <spotbugs-maven-plugin.version>4.10.3.0</spotbugs-maven-plugin.version>
-        <spotless-maven-plugin.version>3.9.0</spotless-maven-plugin.version>
+        <spotless-maven-plugin.version>3.10.0</spotless-maven-plugin.version>
         <!--==================== dependency versions ======================-->
         <annotations.version>26.1.0</annotations.version>
         <jetty.version>12.1.12</jetty.version>