Update lombscargle.rst
Update lombscargle.rst

Small change to formatting to remove warning.
lpsinger/astropy,aleksandr-bakanov/astropy,larrybradley/astropy,pllim/astropy,astropy/astropy,aleksandr-bakanov/astropy,aleksandr-bakanov/astropy,pllim/astropy,StuartLittlefair/astropy,mhvk/astropy,mhvk/astropy,lpsinger/astropy,dhomeier/astropy,larrybradley/astropy,pllim/astropy,saimn/astropy,saimn/astropy,saimn/astropy,larrybradley/astropy,astropy/astropy,StuartLittlefair/astropy,astropy/astropy,larrybradley/astropy,dhomeier/astropy,dhomeier/astropy,mhvk/astropy,pllim/astropy,saimn/astropy,dhomeier/astropy,saimn/astropy,lpsinger/astropy,lpsinger/astropy,StuartLittlefair/astropy,pllim/astropy,aleksandr-bakanov/astropy,mhvk/astropy,larrybradley/astropy,mhvk/astropy,lpsinger/astropy,astropy/astropy,StuartLittlefair/astropy,astropy/astropy,dhomeier/astropy,StuartLittlefair/astropy