x/website: modify URL in golang.org footer to provide more context

[code-reaper08]

Actual :

I noticed that the footer contains supported by Google text, which links to https://www.google.com/.

Expected :

I think the target link doesn't give a good insight, as it links to https://www.google.com/. I would love to see this page, which greatly recognize and support the statement supported by Google

I would be glad to hear from you on this one.

Have a nice day 😄