Update README.md

Author: giovannipbonin

README.md

@@ -39,11 +39,11 @@ I was initially going to use a Slack channel for this, but then I realized that
      9. Parallel Programming
      10. And much, much more.
 - [Week 5](#week-5)
-     1. Divide and Conquer & Sorting
-     2. Graph Search, Shortest Paths, and Data Structures
-- [Week 6](#week-6)
      1. Heaps and Balanced Trees
      2. Dynamic Programming
+- [Week 6](#week-6)
+     1. Divide and Conquer & Sorting
+     2. Graph Search, Shortest Paths, and Data Structures
 - [Week 7](#week-7)
      1. Knapsack problem and More Dynamic Programming
      2. Shortest Paths Revisited, NP-Complete Problems and What To Do About Them