Fix checksum_kind's value
Fix checksum_kind's value

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