Fix screenshot references in README

Updated screenshots in the README to reflect the correct images for the hub and publisher.

Author: Zawwarsami16

README.md

@@ -48,11 +48,12 @@ A fresh `git clone` on a Linux VM, a Groq brain published in one command, and a
 
 **1. Start the hub (Linux VM, terminal 1).** One command brings up the FastAPI router, persistent SQLite, and a public Cloudflare tunnel. The public URL is printed in a box and exposed at `/hub/identity` for any publisher or client to discover.
 
-![hub starting with public tunnel](docs/screenshots/hub.png)
+![publisher live with full URL + KEY box](docs/screenshots/publisher.png)
 
 **2. Publish a brain (Linux VM, terminal 2).** `multi_brain_publisher.py` registers a Groq Llama-3.3-70B publisher under the name `zai`. The publisher auto-discovers the hub's public URL and prints a copy-paste-ready box with `URL`, `KEY`, and a working curl example. Every brain that connects via this script ships with a built-in zhub-aware preamble — so the AI naturally knows it's part of the substrate without anyone writing a system prompt.
 
-![publisher live with full URL + KEY box](docs/screenshots/publisher.png)
+![hub starting with public tunnel](docs/screenshots/hub.png)
+
 
 **3. Talk to it from anywhere (Windows PowerShell).** Same URL + KEY. No zhub install on the client side — just `Invoke-RestMethod`. Three different prompts (intro / meta / code) all answered coherently, with the brain naturally explaining that it's running on Groq Llama 3.3 70B *behind a substrate called zhub that lets it be reached from many places at once*. Nothing in the client said any of that — the substrate did.