use forked action to test its changes

Author: rob93c

.github/workflows/unit-test.yml

@@ -24,7 +24,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup FFmpeg
-        uses: FedericoCarboni/setup-ffmpeg@v3
+        uses: Stickerifier/setup-ffmpeg@improve-ffmpeg-downloads
         with:
           # bump: ffmpeg-ci /ffmpeg-version: '([\d.]+)'/ docker:mwader/static-ffmpeg|~7.0
           ffmpeg-version: '7.0.2'