Change description for SIS integration settings
Change description for SIS integration settings

Fixes: SIS-2682

Test plan:
- Navigate to the Feature Options tab in the Account Settings page
- Confirm the new description is present for the "Enable new SIS
  integration settings"

Change-Id: I877c16a7407fcf77ef5a4ad1b029f61dc2a5257d
Reviewed-on: https://gerrit.instructure.com/115698
Tested-by: Jenkins
Reviewed-by: Brad Humphrey <9233b6f5388d6867a2a7be14d8b4ba53c86cfde2@instructure.com>
QA-Review: Mark McDermott <20dd8ba615f2257ea7254f93d6f30ae11aa4f904@instructure.com>
Product-Review: Oxana

venturehive/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,instructure/canvas-lms