Pontoon: Update Southern Sotho (st) localization of Common Voice
Pontoon: Update Southern Sotho (st) localization of Common Voice

Co-authored-by: sesotho1 <386ceb6482449763612010107cdf1313e191e3c4@uliza.org>
Co-authored-by: sesotho2 <d68cd9f693b0b3d5eb7e155587c8c6b2c426c819@uliza.org>

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