hub4j#1967 Modified rename method

Author: sbouchexbellomie-Philips

src/main/java/org/kohsuke/github/GHBranch.java

@@ -202,7 +202,9 @@ public GHCommit merge(String head, String commitMessage) throws IOException {
      * @see https://docs.github.com/en/rest/branches/branches?apiVersion=2022-11-28#rename-a-branch
      */
     public GHBranch rename(String name) throws IOException {
-        root().createRequest().method("POST").with("new_name", name).withUrlPath(getApiRoute() + "/rename").send();
+        return root().createRequest().method("POST").with("new_name", name)
+                .withUrlPath(getApiRoute() + "/rename")
+                .fetch(GHBranch.class);
     }
 
     /**