Revert "Removed mention of non-existing page"

This reverts commit 0fdd9dd.

README.md

@@ -551,4 +551,8 @@ It is important to briefly explain how the communication between DKG ceremony In
 4. Operators verify each of the messages from other Operators participating in the ceremony and verifies Initiator's signature of the combined message.
 5. During the DKG protocol execution, the BLS auth scheme is used - G2 for its signature space and G1 for its public keys
 
-More details in the [Flow Description](#flow-description) section.
+More details in the [Flow Description](#flow-description) section.
+
+---
+
+More info about how things are designed/work under the hood can be found [here](./design.md)