Bump actions/download-artifact from 4.1.9 to 4.2.1 (#1296)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4.1.9 to 4.2.1.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@cc20338...95815c3)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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/integration-tests.yml

@@ -53,7 +53,7 @@ jobs:
           chmod -R 777 ./codegate_volume
 
       - name: Download the CodeGate container image
-        uses: actions/download-artifact@cc203385981b70ca67e1cc392babf9cc229d5806 # v4
+        uses: actions/download-artifact@95815c38cf2ff2164869cbab79da8d1f422bc89e # v4
         with:
           name: ${{ inputs.artifact-name }}