chore(deps): update actions/checkout action to v3 (#188)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

.github/workflows/codeql-analysis.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         # We must fetch at least the immediate parents so that if this is
         # a pull request then we can checkout the head.

.github/workflows/docker.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         name: Check out code
 
       - uses: mr-smithers-excellent/docker-build-push@v5

.github/workflows/python.yml

@@ -12,7 +12,7 @@ jobs:
         python-version: ['3.6', '3.7', '3.8', '3.9', '3.10']
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v3
       with: