chore: add note about NodeJS version

Author: sinzii

README.md

@@ -56,6 +56,9 @@ Following the instructions, the cli will help you generate a starter & working p
 
 <img width="1919" alt="new-typink-project" src="https://github.com/user-attachments/assets/b10b1366-f97b-41a7-b3e9-97ceb1bd0748" />
 
+> [!IMPORTANT]
+> The `create-typink` cli requires NodeJS version >= `v20` to work properly, please make sure to check your NodeJS version.
+
 
 #### Project folder structure
 - `contracts`: ink! contract artifacts & generated types