Add v3.0.4 and v2.0.8 to the changelog, and post release cleanup [docs only]
Add v3.0.4 and v2.0.8 to the changelog, and post release cleanup [docs only]

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