Update CHANGES.rst
Update CHANGES.rst

Reserve more spaces
Eyepea/aiohttp,singulared/aiohttp,juliatem/aiohttp,alex-eri/aiohttp-1,alex-eri/aiohttp-1,pfreixes/aiohttp,juliatem/aiohttp,rutsky/aiohttp,z2v/aiohttp,alex-eri/aiohttp-1,hellysmile/aiohttp,arthurdarcet/aiohttp,AraHaanOrg/aiohttp,singulared/aiohttp,AraHaanOrg/aiohttp,hellysmile/aiohttp,arthurdarcet/aiohttp,z2v/aiohttp,z2v/aiohttp,playpauseandstop/aiohttp,KeepSafe/aiohttp,singulared/aiohttp,KeepSafe/aiohttp,KeepSafe/aiohttp,rutsky/aiohttp,pfreixes/aiohttp,rutsky/aiohttp,arthurdarcet/aiohttp