update README

README.md

-# ALP4 Tutorial-11
+# ALP4 Tutorial-12
 
-This branch contains all materials for the 9th tutorial session.
+This branch contains all materials for the 12 tutorial session.
 
 ## Agenda
 
 - Assignment's solution presentation
-- Recap & Discussion: RMI, P2P, Cloud Computing
+- Recap & Discussion: exam preparation, more on Web Development
 - Q&A