Update CHANGES.rst
Update CHANGES.rst

Ugh, a3616a8089bea8ad05f987f4ae8e7569fc746045 should have referenced #1903.
joergdietrich/astropy,mhvk/astropy,StuartLittlefair/astropy,funbaker/astropy,stargaser/astropy,pllim/astropy,larrybradley/astropy,astropy/astropy,StuartLittlefair/astropy,astropy/astropy,kelle/astropy,DougBurke/astropy,kelle/astropy,MSeifert04/astropy,larrybradley/astropy,stargaser/astropy,funbaker/astropy,pllim/astropy,dhomeier/astropy,dhomeier/astropy,mhvk/astropy,MSeifert04/astropy,mhvk/astropy,joergdietrich/astropy,larrybradley/astropy,aleksandr-bakanov/astropy,AustereCuriosity/astropy,saimn/astropy,aleksandr-bakanov/astropy,mhvk/astropy,stargaser/astropy,joergdietrich/astropy,pllim/astropy,funbaker/astropy,lpsinger/astropy,pllim/astropy,astropy/astropy,MSeifert04/astropy,aleksandr-bakanov/astropy,AustereCuriosity/astropy,funbaker/astropy,joergdietrich/astropy,DougBurke/astropy,saimn/astropy,AustereCuriosity/astropy,AustereCuriosity/astropy,astropy/astropy,larrybradley/astropy,bsipocz/astropy,bsipocz/astropy,tbabej/astropy,lpsinger/astropy,dhomeier/astropy,kelle/astropy,saimn/astropy,StuartLittlefair/astropy,aleksandr-bakanov/astropy,StuartLittlefair/astropy,tbabej/astropy,dhomeier/astropy,lpsinger/astropy,stargaser/astropy,astropy/astropy,StuartLittlefair/astropy,lpsinger/astropy,lpsinger/astropy,kelle/astropy,pllim/astropy,saimn/astropy,bsipocz/astropy,DougBurke/astropy,tbabej/astropy,mhvk/astropy,bsipocz/astropy,DougBurke/astropy,joergdietrich/astropy,AustereCuriosity/astropy,saimn/astropy,dhomeier/astropy,MSeifert04/astropy,tbabej/astropy,larrybradley/astropy,kelle/astropy,tbabej/astropy