Fix release workflow

.github/workflows/pypi_upload.yml

@@ -17,10 +17,6 @@ jobs:
     - name: Checkout code
       uses: actions/checkout@v2
 
-    - uses: webfactory/ssh-agent@v0.1.1
-      with:
-        ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
-
     - name: Create Release
       id: create_release
       uses: actions/create-release@v1
@@ -33,7 +29,7 @@ jobs:
         prerelease: false
 
     - name: Set up Python 3.7
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v2
       with:
         python-version: 3.7
 
@@ -65,5 +61,8 @@ jobs:
         git config --local user.name 'github-actions[bot]'
         git config --local user.email 'github-actions[bot]@users.noreply.github.com'
         python -m pipenv run inv release.bump-version --dev --commit
-        git push git@github.com:${{ github.repository }}.git HEAD:master
 
+    - name: Push changes
+      uses: ad-m/github-push-action@master
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}