build(deps): bump actions/checkout from 3 to 4 (#5910)

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v3...v4)

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

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

.github/workflows/backend-tests.yml

@@ -22,7 +22,7 @@ jobs:
     steps:
       -
         name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       -
         uses: actions/setup-node@v3
         with:
@@ -59,7 +59,7 @@ jobs:
     steps:
       -
         name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       -
         uses: actions/setup-node@v3
         with:
@@ -120,7 +120,7 @@ jobs:
     steps:
       -
         name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       -
         uses: actions/setup-node@v3
         with:
@@ -153,7 +153,7 @@ jobs:
     steps:
       -
         name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       -
         uses: actions/setup-node@v3
         with: