Upgrade to spotless-plugin 6.12.1

Resolves gh-3589

Author: shakuzen

benchmarks/benchmarks-core/gradle.lockfile

@@ -21,7 +21,7 @@ buildscript {
         classpath 'me.champeau.gradle:japicmp-gradle-plugin:0.4.1'
         classpath 'de.undercouch:gradle-download-task:5.2.1'
         classpath 'io.spring.javaformat:spring-javaformat-gradle-plugin:0.0.35'
-        classpath 'com.diffplug.spotless:spotless-plugin-gradle:6.12.0'
+        classpath 'com.diffplug.spotless:spotless-plugin-gradle:6.12.1'
 
         constraints {
             classpath('org.ow2.asm:asm:7.3.1') {