Minor: fix INSTALL note
Minor: fix INSTALL note

vitalyvolkov/fontbakery,moyogo/fontbakery,graphicore/fontbakery,graphicore/fontbakery,graphicore/fontbakery,googlefonts/fontbakery,moyogo/fontbakery,vitalyvolkov/fontbakery,davelab6/fontbakery,googlefonts/fontbakery,jessamynsmith/fontbakery,googlefonts/fontbakery,moyogo/fontbakery,vitalyvolkov/fontbakery