Update README.md (#360)

Add additional description for custom scopes in initialize

Author: AlvinTCH

README.md

@@ -225,6 +225,7 @@ const config: CapacitorConfig = {
 
 export default config;
 ```
+#### Note: scopes can be configured under <code><a href="#initialize">initialize</a></code> function.
 
 ## API
 
@@ -301,11 +302,11 @@ Signs out the user and returns a Promise.
 
 #### InitOptions
 
-| Prop                     | Type                  | Description                                                                                                                                      | Default            | Since |
-| ------------------------ | --------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------ | ----- |
-| **`clientId`**           | <code>string</code>   | The app's client ID, found and created in the Google Developers Console. Common for Android or iOS. The default is defined in the configuration. |                    | 3.1.0 |
-| **`scopes`**             | <code>string[]</code> | Specifies the scopes required for accessing Google APIs The default is defined in the configuration.                                             |                    |       |
-| **`grantOfflineAccess`** | <code>boolean</code>  | Set if your application needs to refresh access tokens when the user is not present at the browser. In response use `serverAuthCode` key         | <code>false</code> | 3.1.0 |
+| Prop                     | Type                  | Description                                                                                                                                      | Default            | Since      |
+| ------------------------ | --------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------ | ---------- |
+| **`clientId`**           | <code>string</code>   | The app's client ID, found and created in the Google Developers Console. Common for Android or iOS. The default is defined in the configuration. |                    | 3.1.0      |
+| **`scopes`**             | <code>string[]</code> | Specifies the scopes required for accessing Google APIs The default is defined in the configuration.                                             |                    | 3.4.0-rc.4 |
+| **`grantOfflineAccess`** | <code>boolean</code>  | Set if your application needs to refresh access tokens when the user is not present at the browser. In response use `serverAuthCode` key         | <code>false</code> | 3.1.0      |
 
 
 #### User