update sl translation
update sl translation

Change-Id: Idbad5040e3e4a1521e6911aa9b86d7aef908e476
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/302897
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>

instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms