Minor: footer.html: Add link to new issues page on github
Minor: footer.html: Add link to new issues page on github

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