Embed Docs: fix broken link (#4270)

CONTRIBUTORS.rst

@@ -271,6 +271,7 @@ Contributors
 * Florent Osmont
 * J Rob Gant
 * Mary Kate Fain
+* Dário Marcelino
 
 Translators
 ===========

docs/advanced_topics/embeds.rst

@@ -117,7 +117,7 @@ provider using the oEmbed protocol. Wagtail has a built-in list of providers
 which are all enabled by default. You can find that provider list at the
 following link:
 
-https://github.com/wagtail/wagtail/blob/master/wagtail/wagtailembeds/oembed_providers.py
+https://github.com/wagtail/wagtail/blob/master/wagtail/embeds/oembed_providers.py
 
 .. _customising_embed_providers: