build(deps): bump actions/download-artifact from 3 to 4 (#1521)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v3...v4)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  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/test.yml

@@ -147,15 +147,15 @@ jobs:
             go.sum
             **/go.mod
             **/go.sum
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         if: env.GIT_DIFF
         with:
           name: "${{ github.sha }}-coverage"
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         if: env.GIT_DIFF
         with:
           name: "${{ github.sha }}-integration-coverage"
-      - uses: actions/download-artifact@v3
+      - uses: actions/download-artifact@v4
         if: env.GIT_DIFF
         with:
           name: "${{ github.sha }}-mbt-coverage"