fix: update README install command now that requirements.txt is removed

Author: srtaalej

README.md

@@ -84,7 +84,7 @@ source .venv/bin/activate  # for Windows OS, .\.venv\Scripts\Activate instead sh
 #### Install dependencies
 
 ```sh
-pip install -r requirements.txt
+pip install .
 ```
 
 </details>