docs: update image width for upgrade page in billing subscriptions documentation

Author: hannesrudolph

docs/roo-code-cloud/billing-subscriptions.mdx

@@ -45,7 +45,7 @@ Free 14-day trial, then $20/month. Cancel anytime.
 
 ### Step 1: Access Upgrade
 
-<img src="/img/billing-subscriptions/billing-subscriptions-1.png" alt="Upgrade page showing Start Trial for Pro" width="600" />
+<img src="/img/billing-subscriptions/billing-subscriptions-1.png" alt="Upgrade page showing Start Trial for Pro" width="800" />
 
 Open the Upgrade page (for non-subscribers):
 - Go to [app.roocode.com/billing](https://app.roocode.com/billing)