fix ut ppl

Author: YunchuWang

.github/workflows/ci_ut_workflow.yml

@@ -23,21 +23,17 @@ jobs:
         python-version: [3.7, 3.8, 3.9, "3.10", "3.11"]
     permissions: read-all
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Set up Dotnet 3.1.x
-        uses: actions/setup-dotnet@v1
-        with:
-          dotnet-version: "3.1.x"
       - name: Set up Dotnet 6.x
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v4
         with:
           dotnet-version: "6.x"
       - name: Set up Dotnet 8.0.x
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v4
         with:
           dotnet-version: "8.0.x"
       - name: Install dependencies and the worker