Use Rec709 color space in cap_enc_avfoundation #3812

Job	Run time
Detect Changes	7s
Format (Biome)	8s
Format (Cargo)	14s
Typecheck	1m 20s
Build Desktop (x86_64-pc-windows-msvc, windows-latest)	6m 48s
Build Desktop (aarch64-apple-darwin, macos-latest)	3m 33s
Lint (Biome)	10s
Clippy	1m 16s
Verify Tauri plugin versions	0s
	13m 36s

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