Fix Foxx docs markdown
Fix Foxx docs markdown

nvoron23/arangodb,nvoron23/arangodb,nvoron23/arangodb,nvoron23/arangodb,nvoron23/arangodb,nvoron23/arangodb,nvoron23/arangodb,nvoron23/arangodb,nvoron23/arangodb,nvoron23/arangodb