Specify fetch-depth at the right place

Author: RadoRado

.github/workflows/django.yml

@@ -17,8 +17,6 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Fetch history, because Heroku deploy fails otherwise.
-      run: git fetch --prune --unshallow
-    - name: Set up Python 3.9
       uses: actions/setup-python@v2
       with:
         python-version: 3.9
@@ -36,6 +34,8 @@ jobs:
     if: github.ref == 'refs/heads/master'
     steps:
       - uses: actions/checkout@v2
+        with:
+          fetch-depth: "0"
       - name: Deploy to Heroku
         env:
           HEROKU_API_KEY: ${{ secrets.HEROKU_API_KEY }}