Bump spotless-maven-plugin from 2.32.0 to 2.33.0 (#483)

pom.xml

@@ -172,7 +172,7 @@
       <plugin>
         <groupId>com.diffplug.spotless</groupId>
         <artifactId>spotless-maven-plugin</artifactId>
-        <version>2.32.0</version>
+        <version>2.33.0</version>
         <configuration>
           <java>
             <importOrder/>