Update README.md

Author: thecoderxman

README.md

@@ -1,5 +1,7 @@
 # FlightSurety
 
+Note : While buying insurance please use only arrow symbols to increase and decrease price , dont manually enter the price.
+
 FlightSurety is a sample application project for Udacity's Blockchain course.
 
 ## Install
@@ -49,4 +51,4 @@ Deploy the contents of the ./dapp folder
 * [Remix Solidity IDE](https://remix.ethereum.org/)
 * [Solidity Language Reference](http://solidity.readthedocs.io/en/v0.4.24/)
 * [Ethereum Blockchain Explorer](https://etherscan.io/)
-* [Web3Js Reference](https://github.com/ethereum/wiki/wiki/JavaScript-API)
+* [Web3Js Reference](https://github.com/ethereum/wiki/wiki/JavaScript-API)