fix: set correct index to new extension

Signed-off-by: Dominik Willner <th33xitus@gmail.com>

kiauh/extensions/octoapp/metadata.json

@@ -1,6 +1,6 @@
 {
     "metadata": {
-        "index": 8,
+        "index": 9,
         "module": "octoapp_extension",
         "maintained_by": "crysxd",
         "display_name": "OctoApp for Klipper",