chore(deps): Bump actions/checkout from 2 to 4 (#200)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/build.yml

@@ -117,7 +117,7 @@ jobs:
           - 5432:5432
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up Node.js
         uses: actions/setup-node@v4
         with:
@@ -446,7 +446,7 @@ jobs:
     if: ${{ needs.check_changes.outputs.load_tests == 'true' && github.ref == 'refs/heads/main' }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Configure AWS credentials
         uses: aws-actions/configure-aws-credentials@v4
@@ -487,7 +487,7 @@ jobs:
       id-token: write
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Configure AWS credentials
         uses: aws-actions/configure-aws-credentials@v4
@@ -534,7 +534,7 @@ jobs:
       id-token: write
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Configure AWS credentials
         uses: aws-actions/configure-aws-credentials@v4
@@ -584,7 +584,7 @@ jobs:
       id-token: write
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
@@ -614,7 +614,7 @@ jobs:
       [check_changes, build-app-image, build-control-plane-image, test-control-plane]
     steps:
     - name: Checkout code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
     - name: Configure AWS credentials
       uses: aws-actions/configure-aws-credentials@v4
       with: