Fix typo in web ref doc: HTTPMethodNotAllowed (#2653)
Fix typo in web ref doc: HTTPMethodNotAllowed (#2653)


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