use pip from python binary

Author: derek73

.github/workflows/python-package.yml

@@ -27,8 +27,8 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install twine
-        pip install sphinx
+        python -m pip install twine
+        python -m pip install sphinx
         if [ -f dev-requirements.txt ]; then pip install -r dev-requirements.txt; fi
     - name: Run Tests
       run: |