Fix how data is fetched in timeseries examples
Fix how data is fetched in timeseries examples

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