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/melinda-node-tests.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
     - name: Checkout the code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v3
       with:
@@ -35,7 +35,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: mikaelvesavuori/[email protected]
         with:
           exclude_pattern: /^@natlibfi/
@@ -46,7 +46,7 @@ jobs:
 
     steps:
     - name: Checkout the code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: nodejsscan scan
       id: njsscan
       uses: ajinabraham/njsscan-action@master
@@ -59,7 +59,7 @@ jobs:
     if: contains(github.ref, 'refs/tags/')
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       # Setup .npmrc file to publish to npm
       - uses: actions/setup-node@v3
         with: