Meta: github label for new actions #367

There are a lot of proposals for new actions. They're excellent and we should add every single one without pause, at full haste, IMO!

• Subtitles/captions/lyrics #196
• Telephony use cases #199
• Add a skip action #212
• Add a like/dislike action #219
• Add "seek to start" and "seek to live" actions #233
• shuffle and repeat commands #267
• Definition of active media session and the togglemicrophone, togglecamera, hangup actions #278 ?
• Update explainer with video conferencing actions #281 ?
• Add takephoto action to spec #283
• MediaSession should have a playbackrate action handler #361
• New action: record #365
• Reaction with 👎 👍 buttons #366