Move changelog entry to 4.0.2 milestone
Move changelog entry to 4.0.2 milestone

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