Bump com.diffplug.spotless:spotless-plugin-gradle from 6.22.0 to 6.23…

….2 (#120)

build.gradle

@@ -7,7 +7,7 @@ buildscript {
             // Code formatting; defines targets "spotlessApply" and "spotlessCheck".
             // https://github.com/diffplug/spotless/tags ; see tags starting "gradle/"
             // Only works on JDK 11+.
-            classpath 'com.diffplug.spotless:spotless-plugin-gradle:6.22.0'
+            classpath 'com.diffplug.spotless:spotless-plugin-gradle:6.23.2'
         }
     }
 }