Bump com.diffplug.spotless from 6.0.4 to 6.1.0

Bumps com.diffplug.spotless from 6.0.4 to 6.1.0.

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

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

build.gradle

@@ -4,7 +4,7 @@ plugins {
 	id 'maven-publish'
 	id 'signing'
 	id 'pmd' // code check, working on source code
-	id 'com.diffplug.spotless' version '6.0.4'//code format
+	id 'com.diffplug.spotless' version '6.1.0'//code format
 	id 'com.github.spotbugs' version '5.0.3' // code check, working on byte code
 	id 'de.undercouch.download' version '4.1.2'
 	id 'kr.motd.sphinx' version '2.10.1' // documentation generation