fix and add new channel to italy.md

[Brenders]

@infid0 only italian channel here. Next time i load the swiss file with rsi channels but first you have to merge this because i don't know how to open 2 pull requests with different files. to open this pull request I had to delete existing fork to create another one and apply the changes I made last time.

[infid0]

No @Brenders , you don't have understand. The problem not is the separate pull requests, but the duplicated channels.
Example:
"Rtv San Marino" is already present into the San Marino playlist.
"Tv Koper Capodistria" is already present into the Slovenia playlist.
"Tele Ticino" is already present into the Switzerland playlist.
These are a DUPLICATED channels, so are unnecessary. Please don't to add channels already present into the others playlist, thank you so much for the collaboration. :3