changelog.py links point to API, rather than webpage

[miketaylr]

Whoops, just noticed this!

[Pull #2366](https://api.github.com/repos/webcompat/webcompat.com/issues/2366)

* Fixes #2360 - Add blockquote styles [Pull #2366](https://api.github.com/repos/webcompat/webcompat.com/issues/2366)
* Fixes #2225 - Add stylelint-order. Fix ordering in CSS src files [Pull #2365](https://api.github.com/repos/webcompat/webcompat.com/issues/2365)
* Issue #2303. Add some styling to login + keyboard hints. [Pull #2363](https://api.github.com/repos/webcompat/webcompat.com/issues/2363)
* Issue #2271. Use a regular expression to get image upload data URI. [Pull #2362](https://api.github.com/repos/webcompat/webcompat.com/issues/2362)
* Fixes #2358 - Inline code multiline wrap on issue template [Pull #2361](https://api.github.com/repos/webcompat/webcompat.com/issues/2361)
* fixes #2356 - fixed result when older < needsinfo [Pull #2357](https://api.github.com/repos/webcompat/webcompat.com/issues/2357)
* Fixes #2300. Try to respect DNT preference before talking to GA. [Pull #2353](https://api.github.com/repos/webcompat/webcompat.com/issues/2353)

https://github.com/webcompat/webcompat.com/blob/master/tools/changelog.py#L32 computes the url based off the API URL, not the website URL.

[karlcow]

Let's look at this with #2330 too. I will do that today.