Update dependency com.diffplug.spotless:spotless-maven-plugin to v3.2.0 (#56)

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

Author: renovate[bot]

pom.xml

@@ -120,7 +120,7 @@
             <plugin>
                 <groupId>com.diffplug.spotless</groupId>
                 <artifactId>spotless-maven-plugin</artifactId>
-                <version>3.1.0</version>
+                <version>3.2.0</version>
                 <configuration>
                     <java>
                         <googleJavaFormat>