Update code-counter-CI.yml

Author: InnoFang

.github/workflows/code-counter-CI.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.5, 3.6, 3.7, 3.8, 3.9]
+        python-version: [3.6, 3.7, 3.8, 3.9]
 
     steps:
     - uses: actions/checkout@v3
@@ -17,7 +17,4 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
     - name: Test with pytest
-      run: |
-        python -m pip install --upgrade pip
-        pip install pytest
-        pytest
+      run: python -m unittest discover -s test -p "test.py"