Updated Python version of Function-test.yml

.github/workflows/Function-test.yml

@@ -28,6 +28,7 @@ jobs:
         echo $CONDA/bin >> $GITHUB_PATH
     - name: Install dependencies
       run: |
+        python -m pip install --upgrade pip
         pip install -r "requirements.txt"
     - name: Run pruning function test script
       run: |