Fix broken link in CHANGELOG

Author: thibaudcolas

CHANGELOG.md

@@ -4,7 +4,7 @@
 
 ### Added
 
-- Support Wagtail 2.4 & 2.5 ([#43](https://github.com/torchbox/wagtailmedia/pull/43) / [#39]). Thanks to [@DanSGraham](https://github.com/DanSGraham), [@evanwinter](https://github.com/evanwinter), [@kaduuuken](https://github.com/kaduuuken), [@pahacofome](https://github.com/pahacofome), [@kaedroho](https://github.com/kaedroho), [@thibaudcolas](https://github.com/thibaudcolas) for submitting various issues & PRs for this 🎉.
+- Support Wagtail 2.4 & 2.5 ([#43](https://github.com/torchbox/wagtailmedia/pull/43)). Thanks to [@DanSGraham](https://github.com/DanSGraham), [@evanwinter](https://github.com/evanwinter), [@kaduuuken](https://github.com/kaduuuken), [@pahacofome](https://github.com/pahacofome), [@kaedroho](https://github.com/kaedroho), [@thibaudcolas](https://github.com/thibaudcolas) for submitting various issues & PRs for this 🎉.
 - In CI, unit tests now run against combinations of Python 3.5, 3.6, 3.7, Django 1.11, 2.0, 2.1, 2.2, Wagtail 2.2, 2.3, 2.4, 2.5. ([#43](https://github.com/torchbox/wagtailmedia/pull/43), thanks to [@kaedroho](https://github.com/kaedroho)).
 
 ### Changed