Update libvpx | refs #38536

README.md

 # UbiCast ffmpeg build
 
-Build the `ffmpeg-ubicast` package using the `ffmpeg-n[...]-latest-linux64-gpl-[...].tar.xz ` artifact from:
+Build the `ffmpeg-ubicast` package using an artifact from FFmpeg-Builds:
 
-https://github.com/BtbN/FFmpeg-Builds/releases/tag/latest
+https://github.com/BtbN/FFmpeg-Builds/releases

debian/rules

@@ -5,7 +5,7 @@
 
 override_dh_auto_build:
 	echo 'Custom build'
-	curl -sL 'https://github.com/BtbN/FFmpeg-Builds/releases/download/latest/ffmpeg-n6.0-latest-linux64-gpl-6.0.tar.xz' -o archive.tar.xz
+	curl -sL 'https://github.com/BtbN/FFmpeg-Builds/releases/download/autobuild-2023-10-01-12-50/ffmpeg-n6.0-35-g067ed535f4-linux64-gpl-6.0.tar.xz' -o archive.tar.xz
 	mkdir -pv archive
 	tar -xvf archive.tar.xz -C archive
 	mkdir -pv bin