build(deps): bump actions/cache from 3 to 4 (#2933)

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

Author: dependabot[bot]

.github/workflows/_merge_cache.yml

@@ -29,7 +29,7 @@ jobs:
           merge-multiple: true
           path: _local-packages
       - name: Cache pull packages
-        uses: actions/cache/restore@v3
+        uses: actions/cache/restore@v4
         with:
           enableCrossOsArchive: true
           path: ${{ inputs.pypi-dir }}
@@ -50,7 +50,7 @@ jobs:
 
       - name: Cache push packages
         if: env.NUM_PACKAGES != 0
-        uses: actions/cache/save@v3
+        uses: actions/cache/save@v4
         with:
           enableCrossOsArchive: true
           path: ${{ inputs.pypi-dir }}