chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/workflow-synchronization.yaml

@@ -114,7 +114,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Synchronize files
         uses: varunsridharan/action-github-workflow-sync@3.4

sync-root/.github/workflows/label-synchronization.yaml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Synchronize labels
         uses: crazy-max/ghaction-github-labeler@v5

sync-root/.github/workflows/terraform-validation.yaml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Terraform
         uses: hashicorp/setup-terraform@v3
@@ -126,7 +126,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.event.pull_request.head.ref }}
 
@@ -147,7 +147,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.event.pull_request.head.ref }}
 
@@ -168,7 +168,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Run Checkov
         uses: bridgecrewio/checkov-action@v12

sync-root/.github/workflows/update-changelog.yaml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           token: ${{ secrets.MCAF_GITHUB_TOKEN }}