Bump com.diffplug.spotless from 6.11.0 to 6.12.0 (#256)

Bumps com.diffplug.spotless from 6.11.0 to 6.12.0.

---
updated-dependencies:
- dependency-name: com.diffplug.spotless
  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]

build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id "com.diffplug.spotless" version "6.11.0" apply false
+    id "com.diffplug.spotless" version "6.12.0" apply false
 }
 
 subprojects {