Bump org.apache.maven.plugins:maven-gpg-plugin from 3.2.7 to 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] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -56,7 +56,7 @@
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-gpg-plugin</artifactId>
-            <version>3.2.7</version>
+            <version>3.2.8</version>
             <configuration>
               <keyname>9C3D5D0E75C71CE338930BF073FA841FE7DCB91F</keyname>
             </configuration>