Fix installation instructions in README.md

Removed redundant bash code block from installation instructions.

Author: husseinmozannar

README.md

@@ -220,7 +220,6 @@ Once the server is running, you can access the UI at <http://localhost:8081>.
 
 1) First install magentic-ui with the fara extras:
 
-```bash
 ```bash
 python3 -m venv .venv
 source .venv/bin/activate