This actually doesn’t matter.
That’s because your visa is a “travel document”, giving you permission to travel to Canada where the border guard will decide whether or not you could enter.
Your work permit is your “status document” which gives you permission to work in Canada.
As long as you are not travelling outside of Canada during your work permit’s validity, you do not need to renew your visa.
Now, if you do want to travel, you need to apply for that visa extension and you should be able to do so online at IRCC’s website.