Fix link in docstring [skip ci]
Fix link in docstring [skip ci]

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