Bump maven-gpg-plugin from 1.6 to 3.0.1 (#2951)

diff --git a/pom.xml b/pom.xml
index 05e68a4..2b41af4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -51,7 +51,7 @@
     <docker-maven-plugin.version>0.33.0</docker-maven-plugin.version>
     <exec-maven-plugin.version>3.0.0</exec-maven-plugin.version>
     <gmaven-plugin.version>1.5</gmaven-plugin.version>
-    <gpg-maven-plugin.version>1.6</gpg-maven-plugin.version>
+    <gpg-maven-plugin.version>3.0.1</gpg-maven-plugin.version>
     <lifecycle-mapping-plugin.version>1.0.0</lifecycle-mapping-plugin.version>
     <jacoco-maven-plugin.version>0.7.8</jacoco-maven-plugin.version>
     <javadoc-maven-plugin.version>3.4.0</javadoc-maven-plugin.version>