Quote Python versions

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: 3.9
+          python-version: "3.9"
       - name: Install dependencies
         run: |
           python -m pip install -U pip
@@ -47,7 +47,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
         with:
-          python-version: 3.9
+          python-version: "3.9"
       - name: Docker ${{ matrix.script.name }}
         run: sh tests/test_docker.sh ${{ matrix.script.args }}
 

.github/workflows/django-issue-checker.yml

@@ -17,7 +17,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-python@v2.2.2
       with:
-        python-version: 3.9
+        python-version: "3.9"
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip

.github/workflows/pre-commit-autoupdate.yml

@@ -16,7 +16,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-python@v2
       with:
-        python-version: 3.9
+        python-version: "3.9"
 
     - name: Install pre-commit
       run: pip install pre-commit

.github/workflows/update-changelog.yml

@@ -20,7 +20,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: 3.9
+        python-version: "3.9"
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip

.github/workflows/update-contributors.yml

@@ -15,7 +15,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: 3.9
+        python-version: "3.9"
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip