Bump org.apache.maven.plugins:maven-gpg-plugin from 3.2.7 to 3.2.8 (#735)

Author: dependabot[bot]

pom.xml

@@ -114,7 +114,7 @@
     <maven-clean-plugin.version>3.5.0</maven-clean-plugin.version>
     <maven-compiler-plugin.version>3.14.0</maven-compiler-plugin.version>
     <maven-dependency-plugin.version>3.8.1</maven-dependency-plugin.version>
-    <maven-gpg-plugin.version>3.2.7</maven-gpg-plugin.version>
+    <maven-gpg-plugin.version>3.2.8</maven-gpg-plugin.version>
     <maven-install-plugin.version>3.1.4</maven-install-plugin.version>
     <maven-invoker-plugin.version>3.9.1</maven-invoker-plugin.version>
     <maven-jar-plugin.version>3.4.2</maven-jar-plugin.version>