Bump actions/download-artifact from 3.0.1 to 3.0.2 (#870)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 3.0.1 to 3.0.2.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](9782bd6a98...9bc31d5ccc)

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

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

.github/workflows/pull-request.yml

@@ -382,7 +382,7 @@ jobs:
           workload_identity_provider: ${{ secrets.FIREBASE_TEST_LAB_WORKLOAD_IDENTITY_PROVIDER }}
           access_token_lifetime: '900s'
       - name: Download a single artifact
-        uses: actions/download-artifact@9782bd6a9848b53b110e712e20e42d89988822b7
+        uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a
         with:
           name: Demo app release binaries
       - name: Robo test