Pontoon: Update Setswana (tn) localization of Common Voice
Pontoon: Update Setswana (tn) localization of Common Voice

Co-authored-by: setswana1 <ad55f706d98dfc8cd2011550882e2e79a6c66070@uliza.org>

common-voice/common-voice,common-voice/common-voice,common-voice/common-voice,common-voice/common-voice