correct links to Vanguard College Library website from their discovery landing page

[theLinkResolver]

Describe the bug
Vanguard College's website was recently reorganized and their old URL now just points to a picture. (A redirect is not available.)

To Reproduce
Steps to reproduce the behavior:

1. Go to https://catalogue.neoslibraries.ca/?lib=vanguard
2. Click on the links for "Website" or "Vanguard College Library Website"
3. See picture instead of their website

Expected behavior
Clicking the above links should point to: https://www.vanguardcollege.com/library-4/