Bump spotless-maven-plugin from 2.8.0 to 2.8.1

Bumps [spotless-maven-plugin](https://github.com/diffplug/project) from 2.8.0 to 2.8.1.
- [Release notes](https://github.com/diffplug/project/releases)
- [Commits](https://github.com/diffplug/project/commits)

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -431,7 +431,7 @@
                     <plugin>
                         <groupId>com.diffplug.spotless</groupId>
                         <artifactId>spotless-maven-plugin</artifactId>
-                        <version>2.8.0</version>
+                        <version>2.8.1</version>
                         <configuration>
                             <formats>
                                 <format>