Fix find courses page title in bok choy test suite

[wedaly]

Fixes a bok-choy test that broke with a recent change to master. Got to get these running on every PR :)
@jzoldak

[jzoldak]

👍
I don't know if this is implemented on the lms side, but on the studio side I defined the page objects using css locators that the design team told me would always indicate that you're on the right page. In general I think we should probably do this where we can rather than using the browser title, which would change if the site was themed, etc.

[wedaly]

yeah, I usually do that too -- didn't see anything definitive to check on the main page though.