[action] Change the ci branch to lts branch (#28)

* Update action.yml

* Update action.yml

.github/workflows/action.yml

@@ -180,6 +180,9 @@ jobs:
       - uses: actions/checkout@v3
         with:
           repository: RT-Thread/rt-thread
+          fetch-depth: 0
+          ref: lts-v4.1.x
+
       - name: Set up Python
         uses: actions/setup-python@v3
         with: