Bump actions/checkout from 3 to 4

.github/workflows/code-static-analysis.yml

@@ -33,7 +33,7 @@ jobs:
         language: ['python']
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up Python 3.8
         if: ${{ matrix.language == 'python' }}
         uses: actions/setup-python@v4

.github/workflows/deploy-cloud-workflow.yml

@@ -13,7 +13,7 @@ jobs:
     name: Deploy Cloud Workflow
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - id: 'auth'
         name: 'Authenticate to Google Cloud'
         uses: 'google-github-actions/auth@v1'

.github/workflows/deploy-dataflow-flex-template.yml

@@ -17,7 +17,7 @@ jobs:
     name: Deploy Dataflow Flex Template
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - id: 'auth'
         name: 'Authenticate to Google Cloud'
         uses: 'google-github-actions/auth@v1'

.github/workflows/linter.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           # Full git history is needed to get a proper list of changed files within `super-linter`
           fetch-depth: 0

.github/workflows/unittest.yml

@@ -18,7 +18,7 @@ jobs:
         python-version: ["3.8"]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
         with:
@@ -45,7 +45,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: build
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: actions/download-artifact@v3
         id: download