Add changelog entry for GH 4993
Add changelog entry for GH 4993

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