DOC: Fix typo [ci skip]
DOC: Fix typo [ci skip]

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