data/it: fixup some typos (#1730)
data/it: fixup some typos (#1730)

Some found with the following pipeline:
cat frasi.txt  | aspell --lang it list | sort | uniq | less
common-voice/common-voice,gozer/voice-web,gozer/voice-web,gozer/voice-web,gozer/voice-web,gozer/voice-web,common-voice/common-voice,gozer/voice-web,gozer/voice-web,common-voice/common-voice,common-voice/common-voice