fix readme
fix readme

[ci skip]

larrybradley/astropy,dhomeier/astropy,MSeifert04/astropy,kelle/astropy,lpsinger/astropy,DougBurke/astropy,saimn/astropy,stargaser/astropy,joergdietrich/astropy,larrybradley/astropy,mhvk/astropy,mhvk/astropy,mhvk/astropy,joergdietrich/astropy,lpsinger/astropy,lpsinger/astropy,StuartLittlefair/astropy,joergdietrich/astropy,bsipocz/astropy,MSeifert04/astropy,StuartLittlefair/astropy,dhomeier/astropy,aleksandr-bakanov/astropy,aleksandr-bakanov/astropy,tbabej/astropy,kelle/astropy,tbabej/astropy,pllim/astropy,saimn/astropy,aleksandr-bakanov/astropy,larrybradley/astropy,lpsinger/astropy,funbaker/astropy,DougBurke/astropy,AustereCuriosity/astropy,astropy/astropy,MSeifert04/astropy,AustereCuriosity/astropy,StuartLittlefair/astropy,astropy/astropy,saimn/astropy,StuartLittlefair/astropy,kelle/astropy,dhomeier/astropy,bsipocz/astropy,saimn/astropy,aleksandr-bakanov/astropy,AustereCuriosity/astropy,kelle/astropy,larrybradley/astropy,funbaker/astropy,tbabej/astropy,DougBurke/astropy,saimn/astropy,pllim/astropy,funbaker/astropy,MSeifert04/astropy,kelle/astropy,larrybradley/astropy,DougBurke/astropy,AustereCuriosity/astropy,AustereCuriosity/astropy,pllim/astropy,stargaser/astropy,pllim/astropy,joergdietrich/astropy,funbaker/astropy,tbabej/astropy,StuartLittlefair/astropy,dhomeier/astropy,stargaser/astropy,lpsinger/astropy,stargaser/astropy,astropy/astropy,bsipocz/astropy,pllim/astropy,mhvk/astropy,bsipocz/astropy,astropy/astropy,mhvk/astropy,tbabej/astropy,dhomeier/astropy,astropy/astropy,joergdietrich/astropy