Fix broken docs link (#210)

Author: Nikolas De Giorgis

docs/README.md

@@ -3,7 +3,7 @@
 ## Table of Contents
 
 - [Contribute to the MongoDB Kubernetes Operator](/docs/contributing.md)
-- [MongoDB Community Kubernetes Operator Architecture](/docs/architecutre.md)
+- [MongoDB Community Kubernetes Operator Architecture](/docs/architecture.md)
 - [Install and Upgrade the Community Kubernetes Operator](/docs/install-upgrade.md)
 - [Deploy and Configure MongoDB Resources](/docs/deploy-configure.md)
 - [Create Database Users](/docs/users.md)