fix(avutil): correct FFmpeg version of ch_layout (#147) #409

Job	Run time
rust_clippy_check_ubuntu	7m 11s
rustfmt_check (macos-latest)	9s
rustfmt_check (ubuntu-latest)	7s
rust_clippy_check_windows	3m 18s
rustfmt_check (windows-latest)	18s
docs_rs_check	2m 37s
build_static_and_test_ubuntu_with_system_ffmpeg	2m 15s
build_static_and_test_ubuntu	8m 48s
build_dynamic_and_test_macos	1m 58s
build_dynamic_and_test_ubuntu	2m 34s
build_with_vcpkg_ffmpeg_windows (x86_64-pc-windows-msvc, x64-windows-static-md)	1m 26s
build_with_vcpkg_ffmpeg_windows (i686-pc-windows-msvc, x86-windows-static, -Ctarget-feature=+crt-...	1m 33s
build_with_vcpkg_ffmpeg_windows (i686-pc-windows-msvc, x86-windows-static-md)	1m 30s
build_with_vcpkg_ffmpeg_windows (x86_64-pc-windows-msvc, x64-windows-static, -Ctarget-feature=+cr...	1m 27s
build_dynamic_and_test_windows_pre	3m 41s
build_with_vcpkg_ffmpeg_windows (x86_64-pc-windows-msvc, x64-windows, true)	2m 14s
build_with_vcpkg_ffmpeg_windows (i686-pc-windows-msvc, x86-windows, true)	1m 26s
build_dynamic_and_test_windows	1m 40s
	44m 12s

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