chore(deps): update dependency com.diffplug.spotless:spotless-maven-plugin to v3

Author: renovate[bot]

process-solution-camunda-7/pom.xml

@@ -62,7 +62,7 @@
         <plugin>
           <groupId>com.diffplug.spotless</groupId>
           <artifactId>spotless-maven-plugin</artifactId>
-          <version>2.46.1</version>
+          <version>3.7.0</version>
           <configuration>
             <formats>
               <format>

process-solution-camunda-8/pom.xml

@@ -43,7 +43,7 @@
         <plugin>
           <groupId>com.diffplug.spotless</groupId>
           <artifactId>spotless-maven-plugin</artifactId>
-          <version>2.46.1</version>
+          <version>3.7.0</version>
           <configuration>
             <formats>
               <format>