Bump maven-plugin-plugin from 3.6.2 to 3.6.4

Bumps [maven-plugin-plugin](https://github.com/apache/maven-plugin-tools) from 3.6.2 to 3.6.4.
- [Release notes](https://github.com/apache/maven-plugin-tools/releases)
- [Commits](apache/maven-plugin-tools@maven-plugin-tools-3.6.2...maven-plugin-tools-3.6.4)

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

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -146,7 +146,7 @@
     <maven.javadoc.plugin.version>3.3.1</maven.javadoc.plugin.version>
     <maven.jxr.plugin.version>3.1.1</maven.jxr.plugin.version>
     <maven.plugin-tools.version>3.6.4</maven.plugin-tools.version>
-    <maven-plugin.plugin.version>3.6.2</maven-plugin.plugin.version>
+    <maven-plugin.plugin.version>3.6.4</maven-plugin.plugin.version>
     <maven.project-info-reports.plugin.version>3.1.2</maven.project-info-reports.plugin.version>
     <maven.release.plugin.version>2.5.3</maven.release.plugin.version>
     <maven.remote-resources-plugin.version>1.7.0</maven.remote-resources-plugin.version>