Bump com.diffplug.spotless:spotless-plugin-gradle in /gradle/plugins (#131)

Bumps [com.diffplug.spotless:spotless-plugin-gradle](https://github.com/diffplug/spotless) from 7.0.3 to 7.2.1.
- [Release notes](https://github.com/diffplug/spotless/releases)
- [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md)
- [Commits](diffplug/spotless@gradle/7.0.3...gradle/7.2.1)

---
updated-dependencies:
- dependency-name: com.diffplug.spotless:spotless-plugin-gradle
  dependency-version: 7.2.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

gradle/plugins/build.gradle.kts

@@ -4,7 +4,7 @@ repositories { gradlePluginPortal() }
 
 dependencies {
     implementation("com.autonomousapps:dependency-analysis-gradle-plugin:2.15.0")
-    implementation("com.diffplug.spotless:spotless-plugin-gradle:7.0.3")
+    implementation("com.diffplug.spotless:spotless-plugin-gradle:7.2.1")
     implementation("com.gradle:develocity-gradle-plugin:4.0")
     implementation("io.fuchs.gradle.classpath-collision-detector:classpath-collision-detector:1.0.0")
     implementation("org.cyclonedx:cyclonedx-gradle-plugin:2.2.0")