GH-126: Update Maven GPG plugin

pom.xml

@@ -111,6 +111,7 @@
     <license-maven-plugin.version>4.3</license-maven-plugin.version>
     <maven-checkstyle-plugin.version>3.3.1</maven-checkstyle-plugin.version>
     <maven-compiler-plugin.version>3.13.0</maven-compiler-plugin.version>
+    <maven-gpg-plugin.version>3.2.1</maven-gpg-plugin.version>
     <maven-invoker-plugin.version>3.6.0</maven-invoker-plugin.version>
     <maven-jar-plugin.version>3.3.0</maven-jar-plugin.version>
     <maven-javadoc-plugin.version>3.6.3</maven-javadoc-plugin.version>
@@ -123,10 +124,6 @@
     <maven-surefire-plugin.version>3.2.5</maven-surefire-plugin.version>
     <sisu-maven-plugin.version>0.3.5</sisu-maven-plugin.version>
 
-    <!-- Do not update this version. 3.2.0 appears to break pinentry mode -->
-    <maven-gpg-plugin.version>3.1.0</maven-gpg-plugin.version>
-
-
     <!-- Plugin dependencies -->
     <checkstyle.version>10.14.2</checkstyle.version>
     <maven-surefire-junit5-tree-reporter.version>1.2.1</maven-surefire-junit5-tree-reporter.version>