Building Your Resume Project: Update link for Career Cup example

Because

The issue is the URL in the CareerCup example here:

The link, http://www.careercup.com/resume redirects to https://www.gayle.com/blog/consulting/resume - and a We couldn't find the page you were looking for., etc.

This PR

Tiny change! Updates the URL to https://www.gayle.com/resume, which appears to be the intended resume example.

Or, since the link itself is not directly to a CareerCup, it could be removed or I could reword the messaging so it no longer refers to CareerCup. Open to feedback!

Issue

~Closes #XXXXX~

Additional Information

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