Bump FedericoCarboni/setup-ffmpeg from 1 to 2

Bumps [FedericoCarboni/setup-ffmpeg](https://github.com/FedericoCarboni/setup-ffmpeg) from 1 to 2.
- [Release notes](https://github.com/FedericoCarboni/setup-ffmpeg/releases)
- [Commits](federicocarboni/setup-ffmpeg@v1...v2)

---
updated-dependencies:
- dependency-name: FedericoCarboni/setup-ffmpeg
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/test_n_pub.yml

@@ -39,7 +39,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Set up FFmpeg
-        uses: FedericoCarboni/setup-ffmpeg@v1
+        uses: FedericoCarboni/setup-ffmpeg@v2
         with:
           token: ${{ secrets.GITHUB_TOKEN }}