chore(deps): update debian:13-slim docker digest to a99cfc5

Dockerfile

@@ -38,7 +38,7 @@ RUN case "$TARGETARCH" in \
 
 ################################################################################
 # FFmpeg builder stage
-FROM debian:13-slim@sha256:e27e3dbef3b2064bed82f2fef343c0d02a4b8d5675e5b2c511883442e001630d AS ffmpeg-builder
+FROM debian:13-slim@sha256:a99cfc517144bc59b1978475ec53b46ecabec7e43635402ee5b77cc54cd1b20a AS ffmpeg-builder
 RUN apt-get update && \
   apt-get install -y --no-install-recommends ffmpeg
 COPY --from=yt-dlp-builder /rootfs/bin/yt-dlp /yt-dlp