This phish claims to be from canada.ca and the Canadian health care system, but hover over the link and you will find that it does not actually go to canada.ca or a site on .gc.ca (it actually goes to an out-of-country site). Similarly, the sender address is also not from either canada.ca or a .gc.ca site.
For information about the real COVID-19 proof of vaccination, click here, or go directly to canada.ca and find the appropriate link on the homepage.