Added changelog for 12604
Added changelog for 12604

mhvk/astropy,saimn/astropy,pllim/astropy,saimn/astropy,mhvk/astropy,pllim/astropy,saimn/astropy,pllim/astropy,larrybradley/astropy,lpsinger/astropy,mhvk/astropy,larrybradley/astropy,astropy/astropy,saimn/astropy,astropy/astropy,lpsinger/astropy,larrybradley/astropy,lpsinger/astropy,lpsinger/astropy,saimn/astropy,mhvk/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,mhvk/astropy,larrybradley/astropy,astropy/astropy,StuartLittlefair/astropy,astropy/astropy,astropy/astropy,lpsinger/astropy,pllim/astropy,pllim/astropy,StuartLittlefair/astropy,larrybradley/astropy