Add vaccination page to COVID subnavigation (#748)
Add vaccination page to COVID subnavigation (#748)

Co-authored-by: HannahRitchie <7d7dd9eda8cdaadc47d6018313b4e96fb6c4d001@users.noreply.github.com>
Co-authored-by: Marcel Gerber <79fa591313535ddd85f63872df0a5e649d3bbd67@gmail.com>
OurWorldInData/owid-grapher,owid/owid-grapher,owid/owid-grapher,OurWorldInData/owid-grapher,OurWorldInData/owid-grapher,OurWorldInData/owid-grapher,OurWorldInData/owid-grapher,owid/owid-grapher,owid/owid-grapher,owid/owid-grapher