Bump actions/download-artifact from 2 to 4.1.7 in /.github/workflows

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 2 to 4.1.7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v2...v4.1.7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/test.yml

@@ -115,7 +115,7 @@ jobs:
           path: ~/.cache/firebase/emulators
           key: firebase_emulators
       - name: 'Download Artifacts'
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4.1.7
       - name: Run tests
         run: |
           mv rxfire-${{ github.run_id }} dist
@@ -176,7 +176,7 @@ jobs:
           node-version: '20'
           registry-url: 'https://wombat-dressing-room.appspot.com'
       - name: 'Download Artifacts'
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4.1.7
       - name: Publish
         run: |
           cd ./rxfire-${{ github.run_id }}