Fix #1976: cmd -> command in supervisord config example
Fix #1976: cmd -> command in supervisord config example

arthurdarcet/aiohttp,arthurdarcet/aiohttp,arthurdarcet/aiohttp,rutsky/aiohttp,rutsky/aiohttp,KeepSafe/aiohttp,hellysmile/aiohttp,hellysmile/aiohttp,pfreixes/aiohttp,playpauseandstop/aiohttp,KeepSafe/aiohttp,Eyepea/aiohttp,pfreixes/aiohttp,rutsky/aiohttp,KeepSafe/aiohttp