update text for qr mobile login to reflect all apps
update text for qr mobile login to reflect all apps

fixes MBL-14151
flag=mobile_qr_login

test plan:
 - specs pass

Change-Id: I30eb5eac33c7bad30343f971e64d4f2d7ad4d54d
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/231686
Reviewed-by: Pat Renner <792d9ff02286b7420e6cc0794587e33424e05663@instructure.com>
Reviewed-by: Charley Kline <05950d7e90ba5e3da323378368c22b3ffaaf6647@instructure.com>
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
QA-Review: Mark McDermott <20dd8ba615f2257ea7254f93d6f30ae11aa4f904@instructure.com>
Product-Review: Peyton Craighill <b6cfaee6364b0ff4306081e7e83cf8ccde7c2fba@instructure.com>

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