fix asset tag for undeleting wiki pages
fix asset tag for undeleting wiki pages

it's wiki_page_XXX, not wiki_pages_XXX

fixes CNVS-7795

test plan:
 - delete a wiki page in a course
 - go to /courses/X/undelete and restore the page

Change-Id: Ia7607e1c2113d1f00a73a4a1cafb142cc6c3c6fd
Reviewed-on: https://gerrit.instructure.com/26979
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
QA-Review: Matt Fairbourn <5f353e1c97bb9cc046b9db20beca0b9392f6f1b2@instructure.com>
Product-Review: Mark Severson <cdf1f90aee9d0d073a2a24141ebc71887f3ba533@instructure.com>
Reviewed-by: Mark Severson <cdf1f90aee9d0d073a2a24141ebc71887f3ba533@instructure.com>

instructure/canvas-lms,arrivu/arrivu-lms,Unow/canvas-lms,djbender/canvas-lms,fronteerio/canvas-lms,narigone/canvas,juoni/canvas-lms,efrj/canvas-lms,arrivu/hoodemo,grahamb/canvas-lms,arrivu/hoodemo,samuels410/greatlakes-lms,utkarshx/canvas-lms,sfu/canvas-lms,sdeleon28/canvas-lms,snehakachroo1/LSI_replica,jay3126/canvas-lms,Jyaasa/canvas-lms,AndranikMarkosyan/lms,arrivu/arrivu-lms,whalejasmine/canvas-lms,sfu/canvas-lms,Jyaasa/canvas-lms,utkarshx/canvas-lms,arrivu/hoodemo,leftplusrightllc/canvas-lms,antoniuslin/canvas-lms,arrivu/arrivu-lms,kyroskoh/canvas-lms,HotChalk/canvas-lms,venturehive/canvas-lms,wimemx/Canvas,Jyaasa/canvas-lms,kyroskoh/canvas-lms,va7map/canvas-lms,arrivu/qibla-ecampus,matematikk-mooc/canvas-lms,fronteerio/canvas-lms,kyroskoh/canvas-lms,shidao-fm/canvas-lms,instructure/canvas-lms,venturehive/canvas-lms,Jyaasa/canvas-lms,shidao-fm/canvas-lms,skmezanul/canvas-lms,eCNAP/CANVAS,skmezanul/canvas-lms,dgynn/canvas-lms,redconfetti/canvas-lms,greyhwndz/canvas-lms,instructure/canvas-lms,arrivu/qibla-ecampus,samuels410/greatlakes-lms,wrdsb/canvas-lms,juoni/canvas-lms,venturehive/canvas-lms,usmschuck/canvas,instructure/canvas-lms,efrj/canvas-lms,ShreniiNepal/shrenii_lmp,HotChalk/canvas-lms,wrdsb/canvas-lms,samuels410/greatlakes-lms,utkarshx/canvas-lms,landonwilkins/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms,SwinburneOnline/canvas-lms,juoni/canvas-lms,landonwilkins/canvas-lms,jay3126/canvas-lms,djbender/canvas-lms,usmschuck/canvas,grahamb/canvas-lms,samuels410/greatlakes-lms,fronteerio/canvas-lms,matematikk-mooc/canvas-lms,landonwilkins/canvas-lms,sdeleon28/canvas-lms,skmezanul/canvas-lms,antoniuslin/canvas-lms,gbleydon/canvas-lms,snehakachroo1/LSI_replica,jay3126/canvas-lms,va7map/canvas-lms,tgroshon/canvas-lms,Rvor/canvas-lms,Unow/canvas-lms,snehakachroo1/LSI_replica,arrivu/qibla-ecampus,eCNAP/CANVAS,AndranikMarkosyan/lms,wimemx/Canvas,wye0220/shindig-canvas,AndranikMarkosyan/lms,instructure/canvas-lms,wrdsb/canvas-lms,utkarshx/canvas-lms,SwinburneOnline/canvas-lms,efrj/canvas-lms,roxolan/canvas-lms,SwinburneOnline/canvas-lms,ShreniiNepal/shrenii_lmp,wye0220/shindig-canvas,ShreniiNepal/shrenii_lmp,redconfetti/canvas-lms,Rvor/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,roxolan/canvas-lms,leftplusrightllc/canvas-lms,juoni/canvas-lms,efrj/canvas-lms,djbender/canvas-lms,usmschuck/canvas,snehakachroo1/LSI_replica,djbender/canvas-lms,SwinburneOnline/canvas-lms,tgroshon/canvas-lms,grahamb/canvas-lms,skmezanul/canvas-lms,tgroshon/canvas-lms,ShreniiNepal/shrenii_lmp,dgynn/canvas-lms,eCNAP/CANVAS,shidao-fm/canvas-lms,roxolan/canvas-lms,eCNAP/CANVAS,narigone/canvas,grahamb/canvas-lms,instructure/canvas-lms,va7map/canvas-lms,tgroshon/canvas-lms,whalejasmine/canvas-lms,greyhwndz/canvas-lms,Rvor/canvas-lms,narigone/canvas,HotChalk/canvas-lms,redconfetti/canvas-lms,sfu/canvas-lms,greyhwndz/canvas-lms,dgynn/canvas-lms,Rvor/canvas-lms,whalejasmine/canvas-lms,sdeleon28/canvas-lms,antoniuslin/canvas-lms,narigone/canvas,redconfetti/canvas-lms,wimemx/Canvas,greyhwndz/canvas-lms,landonwilkins/canvas-lms,shidao-fm/canvas-lms,Unow/canvas-lms,wye0220/shindig-canvas,fronteerio/canvas-lms,va7map/canvas-lms,wrdsb/canvas-lms,roxolan/canvas-lms,sdeleon28/canvas-lms,usmschuck/canvas,HotChalk/canvas-lms,matematikk-mooc/canvas-lms,kyroskoh/canvas-lms,whalejasmine/canvas-lms,jay3126/canvas-lms,gbleydon/canvas-lms,sfu/canvas-lms,AndranikMarkosyan/lms,dgynn/canvas-lms,gbleydon/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,antoniuslin/canvas-lms,matematikk-mooc/canvas-lms,leftplusrightllc/canvas-lms,leftplusrightllc/canvas-lms