Added section for manual update

docs/station/upgrade.mdx

@@ -8,7 +8,7 @@ import Admonition from '@theme/Admonition';
 
 Existing Station users will need to upgrade their wallets to use the latest version of Station. If this is your first time using Station, follow the [Getting started guide](./get-started.mdx).  
 
-1. Upon opening, your Station extension will automatically update to the latest version. To begin upgrading your wallets, click **Upgrade wallets**.
+1. Upon opening, your Station extension will automatically update to the latest version. If your extension is not automatically updated, restart your browser, clear your cache or navigate to chrome://extensions to enable developer mode and manually update the extension. To begin upgrading your wallets, click **Upgrade wallets**. 
 
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