🐛 Fix page number for UV

[kirkkwang]

Story

After the upgrade, we are now displaying V3 IIIF manifests. We have to then update the logic for displaying the page labels.

Ref:

• https://github.com/samvera/hyku/commit/b0f2c442c18809c31f4cfe02e995558655dfa2b4
• https://github.com/scientist-softserv/adventist_knapsack/issues/243

Expected Behavior Before Changes

Pages reverted to displaying a non helpful page number label.

Expected Behavior After Changes

Pages now display the desired page number label.

Screenshots / Video