build(deps): bump actions/cache from 3 to 4

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

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

Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: Raphaël Vinot <raphael@vinot.info>

Author: dependabot[bot]

.github/workflows/integration.yaml

@@ -58,7 +58,7 @@ jobs:
        - uses: actions/checkout@v4
        - name: Cache docker images
          id: custom-cache
-         uses: actions/cache@v3
+         uses: actions/cache@v4
          with:
            path: ./custom-cache/
            key: custom-cache
@@ -94,7 +94,7 @@ jobs:
 
        - name: Cache docker images
          id: custom-cache
-         uses: actions/cache@v3
+         uses: actions/cache@v4
          with:
            path: ./custom-cache/
            fail-on-cache-miss: true
@@ -150,7 +150,7 @@ jobs:
 
       - name: Cache docker images
         id: custom-cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: ./custom-cache/
           fail-on-cache-miss: true