Update README

Author: ali-behjati

README.md

@@ -65,7 +65,9 @@ You can find a list of available price feeds [here](https://pyth.network/develop
 
 ## Development
 
-When making changes to the contract, please make sure to update the ABI. You can update it using `npm run generate-abi` and it will update `IPythAbi.json` file.
+### ABIs
+
+When making changes to a contract, please make sure to update the ABI. You can update it using `npm run generate-abi` and it will update the ABI files in [abis](./abis) directory. If you create a new contract, you also need to add the contract name in [the ABI generation script](./scripts/generateAbi.js#L5) so the script create ABI file for that contract too.
 
 ### Releases