Update dependency com.diffplug.spotless:spotless-maven-plugin to v3.1.0 (#763)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

pom.xml

@@ -152,7 +152,7 @@
     <mockito.version>5.20.0</mockito.version>
     <spotbugs-annotations.version>4.9.8</spotbugs-annotations.version>
     <spotbugs-maven-plugin.version>4.9.8.1</spotbugs-maven-plugin.version>
-    <spotless-maven-plugin.version>3.0.0</spotless-maven-plugin.version>
+    <spotless-maven-plugin.version>3.1.0</spotless-maven-plugin.version>
     <stapler-maven-plugin.version>278.vc90e156a_c20e</stapler-maven-plugin.version>
   </properties>