DOC: Fix linkcheck error [ci skip]
DOC: Fix linkcheck error [ci skip]

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