Update unittest.yaml

Author: pan-x-c

.github/workflows/unittest.yaml

@@ -16,10 +16,9 @@ jobs:
     runs-on: self-hosted
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@master
       with:
         path: trinity-${{ github.run_id }}
-        fetch-depth: 0
 
     - name: Setup docker compose
       working-directory: trinity-${{ github.run_id }}/.github/workflows/docker