Bump org.apache.maven.plugins:maven-gpg-plugin from 3.2.7 to 3.2.8 (#471)

Bumps [org.apache.maven.plugins:maven-gpg-plugin](https://github.com/apache/maven-gpg-plugin) from 3.2.7 to 3.2.8.

Author: dependabot[bot]

pom.xml

@@ -87,7 +87,7 @@
         <!-- / Build Plugin Versions -->
 
         <!-- Publish to Maven Central Repository -->
-        <maven-gpg-plugin.version>3.2.7</maven-gpg-plugin.version>
+        <maven-gpg-plugin.version>3.2.8</maven-gpg-plugin.version>
         <maven-source-plugin.version>3.3.1</maven-source-plugin.version>
         <central-publishing-maven-plugin.version>0.8.0</central-publishing-maven-plugin.version>
         <!-- /Publish to Maven Central Repository -->