update sl translation
update sl translation

Change-Id: I7cbe0bfcc3cf6ea6dce0048b65b18c632551caba
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/282987
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