Bump maven-plugin-plugin from 3.7.1 to 3.8.1

Bumps [maven-plugin-plugin](https://github.com/apache/maven-plugin-tools) from 3.7.1 to 3.8.1.
- [Release notes](https://github.com/apache/maven-plugin-tools/releases)
- [Commits](apache/maven-plugin-tools@maven-plugin-tools-3.7.1...maven-plugin-tools-3.8.1)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-plugin-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

animal-sniffer-maven-plugin/pom.xml

@@ -108,7 +108,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-plugin-plugin</artifactId>
-        <version>3.7.1</version>
+        <version>3.8.1</version>
         <configuration>
           <!-- see http://jira.codehaus.org/browse/MNG-5346 -->
           <skipErrorNoDescriptorsFound>true</skipErrorNoDescriptorsFound>