update th translation
update th translation

Change-Id: I8741e4aa59de46d7ab11a9812671320a28260a9e
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/286144
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