Bump actions/checkout from 3 to 4 (#21)

Author: dependabot[bot]

.github/workflows/sync-labels.yaml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Sync labels
       uses: crazy-max/ghaction-github-labeler@v5

.github/workflows/terraform.integration.yaml

@@ -25,7 +25,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         fetch-depth: 0
 

.github/workflows/yaml.integration.yaml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         fetch-depth: 0