Fix filename typo in typography.md
Fix filename typo in typography.md

Stadly/foundation-emails,zurb/foundation-emails,zurb/foundation-emails,jsit/foundation-emails,jsit/foundation-emails,zurb/foundation-emails,Stadly/foundation-emails,Stadly/foundation-emails,struankl/foundation-emails,zurb/ink,zurb/foundation-emails,zurb/ink,struankl/foundation-emails,jsit/foundation-emails,Stadly/foundation-emails,struankl/foundation-emails,jsit/foundation-emails,struankl/foundation-emails