[Docs]: require didyoumean.js lib before use

[jamesgeorge007]

Pull Request

Problem

didyoumean.js was used directly in the example without importing the respective package.

Follow up of #1176
Addresses #1015

Solution

Added the necessary require statement.

[shadowspawn]

Thanks. I am happy without the require for now. It is just a fragment, and more an example of what is possible than runnable code. The focus of the example is on the listeners.