Bump gmavenplus-plugin from 1.9.0 to 1.9.1

Bumps [gmavenplus-plugin](https://github.com/groovy/GMavenPlus) from 1.9.0 to 1.9.1.
- [Release notes](https://github.com/groovy/GMavenPlus/releases)
- [Commits](groovy/GMavenPlus@1.9.0...1.9.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

pom.xml

@@ -357,7 +357,7 @@
         <plugin>
           <groupId>org.codehaus.gmavenplus</groupId>
           <artifactId>gmavenplus-plugin</artifactId>
-          <version>1.9.0</version>
+          <version>1.9.1</version>
         </plugin>
         <plugin>
           <groupId>org.codehaus.mojo</groupId>