Bump actions/checkout from 3 to 4

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](actions/checkout@v3...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/E2Etests.yml

@@ -17,15 +17,15 @@ jobs:
           - 5000:5000
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
         with:
           driver-opts: network=host
 
       - name: Clone backend
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: 'CSCfi/beacon-network'
           ref: 'dev'
@@ -42,7 +42,7 @@ jobs:
           cache-to: type=local,dest=/tmp/.buildx-cache
 
       - name: Clone beacon 2
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: 'CSCfi/beacon-2.x'
           ref: 'test'

.github/workflows/codeql-analysis.yml

@@ -35,7 +35,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/dependency-review.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 'Checkout Repository'
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: 'Dependency Review'
         uses: actions/dependency-review-action@v3
         with:

.github/workflows/unittests.yml

@@ -10,7 +10,7 @@ jobs:
         node: ["14"]
     name: Jest unit tests and coveralls push
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Setup node ${{ matrix.node }}
         uses: actions/[email protected]
         with: