update th translation
update th translation

Change-Id: I456beec36fab4f94cf075c45731967afa2935873
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/297643
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms