Bump com.diffplug.spotless:spotless-maven-plugin from 3.6.0 to 3.7.0

Bumps [com.diffplug.spotless:spotless-maven-plugin](https://github.com/diffplug/spotless) from 3.6.0 to 3.7.0.
- [Release notes](https://github.com/diffplug/spotless/releases)
- [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md)
- [Commits](diffplug/spotless@maven/3.6.0...maven/3.7.0)

---
updated-dependencies:
- dependency-name: com.diffplug.spotless:spotless-maven-plugin
  dependency-version: 3.7.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -64,7 +64,7 @@
         -->
         <project.build.outputTimestamp>2026-05-03T00:00:00Z</project.build.outputTimestamp>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <spotless-maven-plugin.version>3.6.0</spotless-maven-plugin.version>
+        <spotless-maven-plugin.version>3.7.0</spotless-maven-plugin.version>
         <!-- excludes @Tag("large") tests by default; override to empty to include them -->
         <surefire.excludedGroups.default>large</surefire.excludedGroups.default>
         <surefire.groups.default />