Football not Sky Calcio or Sky Serie A?
I suppose they're naming it "Sky Sport Football" in order for the channel not to be confused with the Sky Calcio,which are the non-24/7 (belonging to a different package; also available à la carte) 12 channels which show most Serie A and Serie B matches
Sky Sport channels broadcast some Serie A and Serie B matches but not all of them, similar to Sky Sports PL/Football/Main Event in the UK
I doubt they're going to change Sky Calcio channels into Sky Football
Calling it "Sky Sport Serie A" would mean that they cannot show Serie B matches there