update th translation
update th translation

Change-Id: I183ca4005d0d29c6b635779d9a9936bd265de070
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/299827
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