Bump org.apache.maven.plugins:maven-gpg-plugin from 3.2.0 to 3.2.1

Bumps [org.apache.maven.plugins:maven-gpg-plugin](https://github.com/apache/maven-gpg-plugin) from 3.2.0 to 3.2.1.
- [Release notes](https://github.com/apache/maven-gpg-plugin/releases)
- [Commits](apache/maven-gpg-plugin@maven-gpg-plugin-3.2.0...maven-gpg-plugin-3.2.1)

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

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

parent/pom.xml

@@ -116,7 +116,7 @@
         <!-- plugins version -->
         <version.maven.javacc>3.0.1</version.maven.javacc>
         <version.maven.nexus-staging>1.6.13</version.maven.nexus-staging>
-        <version.maven.gpg>3.2.0</version.maven.gpg>
+        <version.maven.gpg>3.2.1</version.maven.gpg>
         <version.protobuf.plugin>0.6.1</version.protobuf.plugin>
 
         <version.junit>4.13.2</version.junit>