Bump org.apache.maven.plugins:maven-gpg-plugin from 1.6 to 3.2.8

Bumps [org.apache.maven.plugins:maven-gpg-plugin](https://github.com/apache/maven-gpg-plugin) from 1.6 to 3.2.8.
- [Release notes](https://github.com/apache/maven-gpg-plugin/releases)
- [Commits](apache/maven-gpg-plugin@maven-gpg-plugin-1.6...maven-gpg-plugin-3.2.8)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-gpg-plugin
  dependency-version: 3.2.8
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pom.xml

@@ -121,7 +121,7 @@
         <surefire.plugin.version>2.22.2</surefire.plugin.version>
         <exec.plugin.version>3.6.2</exec.plugin.version>
         <javadoc.plugin.version>3.12.0</javadoc.plugin.version>
-        <gpg.plugin.version>1.6</gpg.plugin.version>
+        <gpg.plugin.version>3.2.8</gpg.plugin.version>
         <java-jwt.version>3.19.4</java-jwt.version>
         <jackson-databind.version>2.20.0</jackson-databind.version>
         <httpclient.version>4.5.14</httpclient.version>