docs: support ec3 and ac3 codec

README.md

@@ -14,11 +14,12 @@ download https://music.apple.com/jp/song/caribbean-blue/339592231 -c aac
 
 # Support Codec
 
-- `alac`
-- `ec3`
-- `aac`
-- `aac-binaural`
-- `aad-downmix`
+- `alac (audio-alac-stereo)`
+- `ec3 (audio-atmos / audio-ec3)`
+- `ac3 (audio-ac3)`
+- `aac (audio-stereo)`
+- `aac-binaural (audio-stereo-binaural)`
+- `aad-downmix (audio-stereo-downmix)`
 
 # Support Link
 - Apple Music Song Share Link (https://music.apple.com/jp/album/%E5%90%8D%E3%82%82%E3%81%AA%E3%81%8D%E4%BD%95%E3%82%82%E3%81%8B%E3%82%82/1688539265?i=1688539274)