chore(deps): update dependency org.apache.maven.plugins:maven-gpg-plugin from v1.6 to v3

Author: renovate[bot]

pom.xml

@@ -59,7 +59,7 @@
         <maven-enforcer-plugin.version>3.4.1</maven-enforcer-plugin.version>
         <maven-source-plugin.version>3.3.0</maven-source-plugin.version>
         <maven-javadoc-plugin.version>3.6.3</maven-javadoc-plugin.version>
-        <maven-gpg-plugin.version>1.6</maven-gpg-plugin.version>
+        <maven-gpg-plugin.version>3.2.1</maven-gpg-plugin.version>
         <maven-compiler-plugin.version>3.12.1</maven-compiler-plugin.version>
         <maven-jar-plugin.version>3.3.0</maven-jar-plugin.version>
         <maven-clean-plugin.version>3.3.2</maven-clean-plugin.version>