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] <support@github.com>

Author: dependabot[bot]

csv-validator-parent/pom.xml

@@ -235,7 +235,7 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-gpg-plugin</artifactId>
-                    <version>3.2.7</version>
+                    <version>3.2.8</version>
                 </plugin>
             </plugins>
         </pluginManagement>