Update dependency org.apache.maven.plugins:maven-gpg-plugin to v3.2.6

Author: renovate[bot]

pom.xml

@@ -54,7 +54,7 @@
         <nexus-staging-plugin.version>1.7.0</nexus-staging-plugin.version>
         <formatter-maven-plugin.version>2.24.1</formatter-maven-plugin.version>
         <versions-maven-plugin.version>2.17.1</versions-maven-plugin.version>
-        <gpg-plugin.version>3.2.5</gpg-plugin.version>
+        <gpg-plugin.version>3.2.6</gpg-plugin.version>
         <rootDir>${project.basedir}</rootDir>
     </properties>