update README.md file

Author: Muhammad-Altabba

README.md

@@ -21,12 +21,15 @@ yarn add @chainsafe/web3.js-chainlink-plugin
 
 ### Installing Version `4.x` of `web3`
 
-When adding version `4.x` of the `web3` package to your project, make sure to use the `@alpha` tag to install the correct version like so:
+When adding the `web3` package to your project, make sure to use version `4.x`. You can append `@4.0.1-rc.2` tag to install RC2 of version 4:
 
--   `npm i -S web3@alpha`
--   `yarn add web3@alpha`
+-   `npm i -S web3@4.0.1-rc.2`
+-   `yarn add web3@4.0.1-rc.2`
 
-To verify you have the correct `web3` version installed, after adding the package to your project (the above commands), look at the versions listed in your project's `package.json` under the `dependencies` section, it should contain something similiar to:
+> **_NOTE_**  
+> If 4.x was already released, you are good to just use `web3` without appending anything to it.
+
+To verify you have the correct `web3` version installed, after adding the package to your project (the above commands), look at the versions listed in your project's `package.json` under the `dependencies` section, it should contain version 4.x similar to:
 
 ```json
 "dependencies": {