MNT: Avoid stalebot running in forks
MNT: Avoid stalebot running in forks

[ci skip]
StuartLittlefair/astropy,larrybradley/astropy,pllim/astropy,astropy/astropy,saimn/astropy,saimn/astropy,larrybradley/astropy,saimn/astropy,StuartLittlefair/astropy,pllim/astropy,astropy/astropy,larrybradley/astropy,lpsinger/astropy,mhvk/astropy,saimn/astropy,mhvk/astropy,astropy/astropy,pllim/astropy,lpsinger/astropy,mhvk/astropy,lpsinger/astropy,astropy/astropy,StuartLittlefair/astropy,lpsinger/astropy,larrybradley/astropy,mhvk/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,pllim/astropy,mhvk/astropy,lpsinger/astropy,astropy/astropy,larrybradley/astropy,pllim/astropy,saimn/astropy