Update usermods/usermod_v2_rotary_encoder_ui_ALT/library.json

Fix typo in json

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

usermods/usermod_v2_rotary_encoder_ui_ALT/library.json

@@ -1,5 +1,5 @@
 {
-  "name:": "rotary_encoder_ui_ALT",
+  "name": "rotary_encoder_ui_ALT",
   "build": {
     "extraScript": "setup_deps.py"
   }