Change p to div to fix warning
Change p to div to fix warning

Was getting a console warning about a <div> being inside a <p>. This
changes the outer <p> to a <div>.

owid/owid-grapher,OurWorldInData/owid-grapher,OurWorldInData/owid-grapher,OurWorldInData/owid-grapher,OurWorldInData/owid-grapher,owid/owid-grapher,owid/owid-grapher,owid/owid-grapher,OurWorldInData/owid-grapher,owid/owid-grapher