Bump org.apache.maven.plugins:maven-gpg-plugin from 3.1.0 to 3.2.1

Bumps [org.apache.maven.plugins:maven-gpg-plugin](https://github.com/apache/maven-gpg-plugin) from 3.1.0 to 3.2.1.
- [Release notes](https://github.com/apache/maven-gpg-plugin/releases)
- [Commits](apache/maven-gpg-plugin@maven-gpg-plugin-3.1.0...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-minor
...

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

pom.xml

@@ -34,7 +34,7 @@
         <maven-source-plugin.version>3.3.0</maven-source-plugin.version>
         <maven-surefire-plugin.version>3.2.5</maven-surefire-plugin.version>
         <maven-invoker-plugin.version>3.6.0</maven-invoker-plugin.version>
-        <maven-gpg-plugin.version>3.1.0</maven-gpg-plugin.version>
+        <maven-gpg-plugin.version>3.2.1</maven-gpg-plugin.version>
         <nexus-staging-maven-plugin.version>1.6.13</nexus-staging-maven-plugin.version>
         <jacoco-maven-plugin.version>0.8.11</jacoco-maven-plugin.version>
         <pitest-maven-plugin.version>1.15.8</pitest-maven-plugin.version>