chore(deps): update dependency org.apache.maven.plugins:maven-gpg-plugin to v3.2.8 (#522)

Author: renovate-bot

pom.xml

@@ -248,7 +248,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-gpg-plugin</artifactId>
-          <version>3.2.7</version>
+          <version>3.2.8</version>
         </plugin>
         <plugin>
           <groupId>eu.somatik.serviceloader-maven-plugin</groupId>