Replace broken link in docs

[benhalpern]

I noticed a broken link in the polyfill section of the docs that attempts to link to a post getting into Polyfills for general information, but that post redirects to the home page of Hackernoon, so seems to have been deleted.

I replaced it with a helpful and informative DEV post that seems to accomplish similar goals for the link. Whether or not this is the perfect replacement, it is a good post, and is definitely an upgrade from the current broken link.

Small fix, have a nice day!

[GeoffreyBooth]

The original article appears to also be at https://medium.com/hackernoon/polyfills-everything-you-ever-wanted-to-know-or-maybe-a-bit-less-7c8de164e423. I’m also happy to include three links.

To be mergeable, you need to also run cake doc:site and commit the changed files.