Add rename to registry.json (modmail-dev#3276)

* Add `rename` to `registry.json`

Signed-off-by: Nicklaus <100449899+Nicklaus-s@users.noreply.github.com>

* Change icon

Signed-off-by: Nicklaus <100449899+Nicklaus-s@users.noreply.github.com>

---------

Signed-off-by: Nicklaus <100449899+Nicklaus-s@users.noreply.github.com>

Author: Nicklaus-s

plugins/registry.json

@@ -124,5 +124,14 @@
         "title": "Top Supporters",
         "icon_url": "https://i.imgur.com/Mo60CdK.png",
         "thumbnail_url": "https://i.imgur.com/Mo60CdK.png"
+    },
+    "rename": {
+        "repository": "Nicklaus-s/modmail-plugins",
+        "branch": "master",
+        "description": "Set a thread channel name.",
+        "bot_version": "4.0.0",
+        "title": "Rename",
+        "icon_url": "https://i.imgur.com/A1auJ95.png",
+        "thumbnail_url": "https://i.imgur.com/A1auJ95.png"
     }
 }