[gradle-module-metadata-maven-plugin] update to version 1.0 (#722)

Signed-off-by: Jendrik Johannes <[email protected]>

Author: jjohannes

pom.xml

@@ -190,7 +190,7 @@ alternative support for serializing POJOs as XML and deserializing XML as pojos.
       </plugin>
       <!-- 05-Jul-2020, tatu: Add gradle module metadata -->
       <plugin>
-        <groupId>de.jjohannes</groupId>
+        <groupId>org.gradlex</groupId>
         <artifactId>gradle-module-metadata-maven-plugin</artifactId>
       </plugin>
     </plugins>