[ci] fix ray test

.github/workflows/ray_test.yml

@@ -19,12 +19,10 @@ on:
 jobs:
   ray:
     runs-on: [self-hosted, gpu] # test if the enviroment is ready
-      # - name: Install dependencies
-      #   run: |
-      #     python -m pip install --upgrade pip
-      #     pip install yapf
-      #     pip install toml==0.10.2
     steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+            fetch-depth: 0
       - name: Running some ray test that only need 2 GPUs
         run: |
           cd tests/ray