chore(deps): bump actions/checkout from 3 to 4 (#157)

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

.github/workflows/helm.yml

@@ -17,7 +17,7 @@ jobs:
     name: Tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: azure/[email protected]
         with:
           version: "v3.5.0"
@@ -46,7 +46,7 @@ jobs:
     if: github.ref == 'refs/heads/main' && github.event_name == 'push'
     needs: test
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: azure/[email protected]
         with:
@@ -61,7 +61,7 @@ jobs:
           helm package charts/hlf-k8s
 
       - name: Clone Substra charts
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: Substra/charts
           ref: 'main'