Bump com.diffplug.spotless from 7.2.0 to 7.2.1 (#328)

Author: dependabot[bot]

build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id 'com.diffplug.spotless' version '7.2.0' apply false
+    id 'com.diffplug.spotless' version '7.2.1' apply false
     id 'info.solidsoft.pitest' version '1.15.0' apply false
     id 'io.github.gradle-nexus.publish-plugin' version '2.0.0'
     id 'me.champeau.jmh' version '0.7.3' apply false