update readme

README.md

@@ -6,12 +6,13 @@ To install, start by creating a virtual environment and installing the dependenc
 python3 -m venv venv
 source venv/bin/activate
 pip install -r requirements.txt
+pip install -e .
 ```
 
 To run the script, use the following command:
 
 ```
-python walletcheck/cli.py --rpc-url <substrate-rpc-url> --csv-file <path-to-csv-file> -o <path-to-output-file>
+walletcheck --rpc-url <substrate-rpc-url> --csv-file <path-to-csv-file> -o <path-to-output-file>
 ```
 
 The script will read the CSV file, extract the account addresses, and check the balance of each account against the Substrate chain. The results will be written to the output file in CSV format with the following fields: