Bump org.apache.maven.plugins:maven-gpg-plugin from 3.1.0 to 3.2.8

Bumps [org.apache.maven.plugins:maven-gpg-plugin](https://github.com/apache/maven-gpg-plugin) from 3.1.0 to 3.2.8.
- [Release notes](https://github.com/apache/maven-gpg-plugin/releases)
- [Commits](apache/maven-gpg-plugin@maven-gpg-plugin-3.1.0...maven-gpg-plugin-3.2.8)

---
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-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -68,7 +68,7 @@
     <version.plugin.jar>3.5.1</version.plugin.jar>
     <version.plugin.source>3.4.0</version.plugin.source>
     <version.plugin.javadoc>3.12.0</version.plugin.javadoc>
-    <version.plugin.gpg>3.1.0</version.plugin.gpg>
+    <version.plugin.gpg>3.2.8</version.plugin.gpg>
     <version.plugin.surefire>3.5.6</version.plugin.surefire>
     <version.plugin.failsafe>3.5.6</version.plugin.failsafe>
     <version.plugin.clean>3.3.2</version.plugin.clean>