Bump org.apache.maven.plugins:maven-gpg-plugin from 3.1.0 to 3.2.8

Bumps [org.apache.maven.plugins:maven-gpg-plugin](https://github.com/apache/maven-gpg-plugin) from 3.1.0 to 3.2.8.
- [Release notes](https://github.com/apache/maven-gpg-plugin/releases)
- [Commits](https://github.com/apache/maven-gpg-plugin/compare/maven-gpg-plugin-3.1.0...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-minor
...

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

Closes #119

Change-Id: I12c9b8e1c2aa7320d53b7a2ae955a82df9e9059e
diff --git a/pom.xml b/pom.xml
index 4f31339..8d2afd2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -333,7 +333,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-gpg-plugin</artifactId>
-                <version>3.1.0</version>
+                <version>3.2.8</version>
                 <executions>
                     <execution>
                         <id>sign-artifacts</id>