Clean up 'How to Update' section formatting

Removed HTML tags from the 'How to Update' section in README.md.

README.md

@@ -121,8 +121,7 @@ Open `http://localhost:3000` to view the dashboard! *(Requires [Docker Desktop](
 
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-<details>
+🔄 How to Update
-<summary>🔄 How to Update</summary>
 
 ShadowBroker uses pre-built Docker images — no local building required. Updating takes seconds:
 
@@ -181,8 +180,6 @@ docker compose up -d
 * **Check logs:** `docker compose logs -f backend`
 
 
-</details>
-
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 <details>