Add v3.2 to the changelog
Add v3.2 to the changelog

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