Changed text on accesibility warnings in calendar
Changed text on accesibility warnings in calendar

test plan:
 * Load calendar
 * In week view, press tab until accessibility warning appears
 * Verify that text matches what is specified in jira ticket
 * Switch to month view
 * Verify same text change from month view

Fixes CNVS-18231

Change-Id: I0d467669cb80722b8c6692bf77d1654410058475
Reviewed-on: https://gerrit.instructure.com/50431
Reviewed-by: Andrew Butterfield <c9c7a32d9a1e9779cfad12bed963960e7af36eac@instructure.com>
Tested-by: Jenkins
QA-Review: Steven Shepherd <e794458448443812fb2685675aab3bbd1a3891bc@instructure.com>
Product-Review: Jonathan Featherstone <c99460343437e667b0585ea68fd7caf7bd0a02ab@instructure.com>

va7map/canvas-lms,juoni/canvas-lms,ShreniiNepal/shrenii_lmp,grahamb/canvas-lms,dgynn/canvas-lms,va7map/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,jay3126/canvas-lms,narigone/canvas,grahamb/canvas-lms,sfu/canvas-lms,Rvor/canvas-lms,antoniuslin/canvas-lms,wrdsb/canvas-lms,ShreniiNepal/shrenii_lmp,shidao-fm/canvas-lms,venturehive/canvas-lms,eCNAP/CANVAS,whalejasmine/canvas-lms,HotChalk/canvas-lms,instructure/canvas-lms,eCNAP/CANVAS,Jyaasa/canvas-lms,eCNAP/CANVAS,jay3126/canvas-lms,AndranikMarkosyan/lms,sfu/canvas-lms,HotChalk/canvas-lms,Jyaasa/canvas-lms,snehakachroo1/LSI_replica,djbender/canvas-lms,HotChalk/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,Jyaasa/canvas-lms,sfu/canvas-lms,va7map/canvas-lms,matematikk-mooc/canvas-lms,djbender/canvas-lms,Rvor/canvas-lms,instructure/canvas-lms,efrj/canvas-lms,jay3126/canvas-lms,matematikk-mooc/canvas-lms,kyroskoh/canvas-lms,sfu/canvas-lms,shidao-fm/canvas-lms,instructure/canvas-lms,grahamb/canvas-lms,wrdsb/canvas-lms,utkarshx/canvas-lms,whalejasmine/canvas-lms,skmezanul/canvas-lms,venturehive/canvas-lms,utkarshx/canvas-lms,greyhwndz/canvas-lms,snehakachroo1/LSI_replica,sfu/canvas-lms,jay3126/canvas-lms,HotChalk/canvas-lms,leftplusrightllc/canvas-lms,sdeleon28/canvas-lms,leftplusrightllc/canvas-lms,instructure/canvas-lms,fronteerio/canvas-lms,eCNAP/CANVAS,antoniuslin/canvas-lms,whalejasmine/canvas-lms,antoniuslin/canvas-lms,sdeleon28/canvas-lms,greyhwndz/canvas-lms,efrj/canvas-lms,SwinburneOnline/canvas-lms,fronteerio/canvas-lms,ShreniiNepal/shrenii_lmp,kyroskoh/canvas-lms,roxolan/canvas-lms,narigone/canvas,narigone/canvas,matematikk-mooc/canvas-lms,sdeleon28/canvas-lms,kyroskoh/canvas-lms,tgroshon/canvas-lms,skmezanul/canvas-lms,skmezanul/canvas-lms,grahamb/canvas-lms,sdeleon28/canvas-lms,antoniuslin/canvas-lms,roxolan/canvas-lms,fronteerio/canvas-lms,redconfetti/canvas-lms,dgynn/canvas-lms,tgroshon/canvas-lms,instructure/canvas-lms,roxolan/canvas-lms,wrdsb/canvas-lms,sfu/canvas-lms,Jyaasa/canvas-lms,utkarshx/canvas-lms,juoni/canvas-lms,kyroskoh/canvas-lms,juoni/canvas-lms,SwinburneOnline/canvas-lms,SwinburneOnline/canvas-lms,roxolan/canvas-lms,skmezanul/canvas-lms,instructure/canvas-lms,AndranikMarkosyan/lms,utkarshx/canvas-lms,grahamb/canvas-lms,redconfetti/canvas-lms,Rvor/canvas-lms,wrdsb/canvas-lms,shidao-fm/canvas-lms,AndranikMarkosyan/lms,shidao-fm/canvas-lms,matematikk-mooc/canvas-lms,SwinburneOnline/canvas-lms,venturehive/canvas-lms,redconfetti/canvas-lms,greyhwndz/canvas-lms,fronteerio/canvas-lms,efrj/canvas-lms,leftplusrightllc/canvas-lms,AndranikMarkosyan/lms,leftplusrightllc/canvas-lms,tgroshon/canvas-lms,tgroshon/canvas-lms,djbender/canvas-lms,efrj/canvas-lms,whalejasmine/canvas-lms,snehakachroo1/LSI_replica,snehakachroo1/LSI_replica,Rvor/canvas-lms,narigone/canvas,redconfetti/canvas-lms,dgynn/canvas-lms,juoni/canvas-lms,va7map/canvas-lms,dgynn/canvas-lms,greyhwndz/canvas-lms,ShreniiNepal/shrenii_lmp