fix: fix error in github push

fix the error thrown by GitHub Push actions.
See reference here: ad-m/github-push-action#44

.github/workflows/build.yml

@@ -17,6 +17,9 @@ jobs:
 
     steps:
     - uses: actions/checkout@master
+      with:
+         persist-credentials: false
+         fetch-depth: 0
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@master
@@ -80,7 +83,7 @@ jobs:
         git commit -m "Update figures by GitHub Actions" -a
   
     - name: GitHub Push
-      uses: ad-m/github-push-action@v0.5.0
+      uses: ad-m/github-push-action@master
       with:
         # Token for the repo. Can be passed in using $\{{ secrets.GITHUB_TOKEN }}
         github_token: ${{ secrets.GITHUB_TOKEN }}