Bump org.apache.maven.plugins:maven-gpg-plugin from 3.2.4 to 3.2.8 (#219)

Author: dependabot[bot]

pom.xml

@@ -51,7 +51,7 @@
         <maven.source.plugin.version>3.3.1</maven.source.plugin.version>
         <maven.bundle.plugin.version>6.0.0</maven.bundle.plugin.version>
         <maven.animal.sniffer.plugin.version>1.14</maven.animal.sniffer.plugin.version>
-        <maven.gpg.plugin.version>3.2.4</maven.gpg.plugin.version>
+        <maven.gpg.plugin.version>3.2.8</maven.gpg.plugin.version>
         <maven.javadoc.plugin.version>3.11.2</maven.javadoc.plugin.version>
         <bytebuddy.version>1.17.1</bytebuddy.version>