Broken link in Cache Expiry help item

[m-bodmer]

The following URL http://heatherevens.me.uk/2013/07/01/filename-based-cache-busting-made-easy/ results in a 404.

It is located here:
https://github.com/passmarked/network/blame/develop/docs/expire.internal.md#L9

[Johanndutoit]

Ah awesome, thanks for noting. Will replace with a new source

[Johanndutoit]

PR is over at - #29. Will merge after tests pass and will be live on the site in a few hours, depending on cache.

Replaced both links with some that I think make a bit more sense in the context.

[Johanndutoit]

Merged, and as mentioned will be live in a few hours. And will be included in the next NPM release version. Quickly did it to avoid any 404's on the site, but any other resources feel free to open a PR and add to the list :)