Bump org.apache.maven.plugins:maven-gpg-plugin from 3.2.7 to 3.2.8

Bumps [org.apache.maven.plugins:maven-gpg-plugin](https://github.com/apache/maven-gpg-plugin) from 3.2.7 to 3.2.8.
- [Release notes](https://github.com/apache/maven-gpg-plugin/releases)
- [Commits](apache/maven-gpg-plugin@maven-gpg-plugin-3.2.7...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-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -74,7 +74,7 @@
       <exec.plugin.version>3.5.0</exec.plugin.version>
       <findbugs.plugin.version>3.0.5</findbugs.plugin.version>
       <gmavenplus.plugin.version>4.2.1</gmavenplus.plugin.version>
-      <gpg.plugin.version>3.2.7</gpg.plugin.version>
+      <gpg.plugin.version>3.2.8</gpg.plugin.version>
       <install.plugin.version>3.1.4</install.plugin.version>
       <jar.plugin.version>3.4.2</jar.plugin.version>
       <javadoc.plugin.version>3.12.0</javadoc.plugin.version>