change datahub to colab

Author: Jacky

faqs/fa25.md

@@ -177,7 +177,7 @@ The EdStem will be made live in the first week of class.
 ## I can't find any information on bCourses. Why?
 
 As long as you are enrolled in the class right now, you don't need anything.
-All class materials are available online through the website; communications happen on EdStem; and computational work is done on the DataHub.
+All class materials are available online through the website; communications happen on EdStem; and computational work is done on the Google colab.
 
 --- 
 ## I have added the course later in the semester. Can I catch up? Can I be excused for all the late work?