Fixed link to swagger in readme

Author: MediaURL1

README.md

@@ -81,7 +81,7 @@ When you change the metadata of your addon (like adding a new `item` or `source`
 
 Much of our documentation is in our code. Depending on your editor you should see most of the documentation while writing or when hovering a variable or function.
 
-Please also check out our object schema here: https://www.mediaurl.io/swagger
+Please also check out our object schema here: https://www.mediaurl.io/swagger/
 
 ### Publish and rename