Good that you took action. But it is still not compliant. You must link to original work by Renee. You need include link to her blog, where she posted the design.

See here: https://creativecommons.org/licenses/by/3.0/

> If supplied, you must provide the name of the creator and attribution parties, a copyright notice, a license notice, a disclaimer notice, and a link to the material.

For reference, here is how official Golang README puts it:

> The Go gopher was designed by Renee French. (http://reneefrench.blogspot.com/)