Revert "update ffmpeg to n7.1.1"

This reverts commit ced67f7.

Author: zoff99

circle_scripts/deps.sh

@@ -16,7 +16,7 @@ build_yasm="0"
 
 ## ----------------------
 FORTIFY_FLAGS="" # "-D_FORTIFY_SOURCE=2"
-_FFMPEG_VERSION_="n7.1.1"
+_FFMPEG_VERSION_="n7.1"
 _OPUS_VERSION_="v1.5.2"
 _VPX_VERSION_="v1.15.1"
 _LIBSODIUM_VERSION_="1.0.20-RELEASE"