Added feed for The Digital Cat, previously removed due to errors in the XML (#488)

Author: lgiordani

config/config.ini

@@ -1380,6 +1380,9 @@ name = TestDriven.io
 [http://www.thedatascientist.de/category/python/feed/]
 name = The Data Scientist
 
+[https://www.thedigitalcatonline.com/categories/python/atom.xml]
+name = The Digital Cat
+
 [https://no-title.victordomingos.com/feeds/python_rss.xml]
 name = The No Title® Tech Blog