ci: try installing chrome before uv sync

Author: mistydemeo

.github/workflows/dependabot.yml

@@ -10,6 +10,10 @@ jobs:
     if: github.event.pull_request.user.login == 'dependabot[bot]' && github.repository == 'internetarchive/brozzler'
     steps:
       - uses: actions/checkout@v4
+      - name: Install chrome
+        run: |
+          sudo apt-get update
+          sudo apt-get install chromium-browser
       - name: Install uv
         uses: astral-sh/setup-uv@v5
       - name: Test new yt-dlp