Update README.md

Author: amrutha95

packages/providers/mgt-electron-provider/README.md

@@ -31,7 +31,7 @@ The `@microsoft/mgt-electron-provider` package exposes the `ElectronAuthenticato
       width: 800,
       height: 800,
       webPreferences: {
-        nodeIntegration: true 
+        nodeIntegration: true //Make sure this is true
       }
     });
     let config: MsalElectronConfig = {
@@ -44,6 +44,7 @@ The `@microsoft/mgt-electron-provider` package exposes the `ElectronAuthenticato
     };
     ElectronAuthenticator.initialize(config);
     ```
+Note : Make sure `nodeIntegration` is set to `true` under `webPreferences` while creating a new BrowserWindow instance. 
 
 See [provider usage documentation](https://docs.microsoft.com/graph/toolkit/providers) to learn about how to use the providers with the mgt components, to sign in/sign out, get access tokens, call Microsoft Graph, and more. See [Electron provider documentation](https://docs.microsoft.com/graph/toolkit/providers/electron).