Revert "trying python3 and pip3"

This reverts commit 7937fb6ee6.

.github/workflows/ut-analysis.yml

@@ -28,9 +28,9 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
-        python3 -m pip3 install --upgrade pip3
-        pip3 install flake8 pytest
-        if [ -f requirements.txt ]; then pip3 install -r requirements.txt; fi
+        python -m pip install --upgrade pip
+        pip install flake8 pytest
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
       working-directory: ${{ env.working-directory }}
     - name: Lint with flake8
       run: |