Bump org.apache.maven.plugins:maven-gpg-plugin from 1.6 to 3.2.4 (#541)

Bumps [org.apache.maven.plugins:maven-gpg-plugin](https://github.com/apache/maven-gpg-plugin) from 1.6 to 3.2.4.
- [Release notes](https://github.com/apache/maven-gpg-plugin/releases)
- [Commits](apache/maven-gpg-plugin@maven-gpg-plugin-1.6...maven-gpg-plugin-3.2.4)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pom.xml

@@ -141,7 +141,7 @@
         <maven.xml.version>1.0.2</maven.xml.version>
         <maven.invoker.version>3.7.0</maven.invoker.version>
         <org.asciidoctor-plugin.version>2.2.4</org.asciidoctor-plugin.version>
-        <maven-gpg-plugin.version>1.6</maven-gpg-plugin.version>
+        <maven-gpg-plugin.version>3.2.4</maven-gpg-plugin.version>
         <nexus-staging-maven-plugin.version>1.7.0</nexus-staging-maven-plugin.version>
         <maven.sonar.version>4.0.0.4121</maven.sonar.version>
         <!-- Maven config -->