[SDK-163]: Corrected Flask README link

Author: echarrod

README.md

@@ -152,7 +152,7 @@ Both example applications utilise the env variables described in [Configuration]
 
 ### Plugins ###
 
-Plugins for both Django and Flask are in the `plugins/` dir. Their purpose is to make it as easy as possible to use the Yoti SDK with those frameworks. See the [Django](/plugins/django_yoti/README.md) and [Flask](/plugins/flask_yoti/README.mdl) README files for further details.
+Plugins for both Django and Flask are in the `plugins/` dir. Their purpose is to make it as easy as possible to use the Yoti SDK with those frameworks. See the [Django](/plugins/django_yoti/README.md) and [Flask](/plugins/flask_yoti/README.md) README files for further details.
 
 ## Running the Tests