Update CSS classes in billing pages

The CSS classes in the billing pages of both the account and user sections have been modified. The 'mx-auto' class, which previously applied automatic horizontal margins to the elements, has been removed to adjust the layout.

apps/web/app/home/(user)/billing/page.tsx

@@ -61,9 +61,7 @@ async function PersonalAccountBillingPage() {
 
           <If condition={data}>
             {(data) => (
-              <div
-                className={'mx-auto flex w-full max-w-2xl flex-col space-y-6'}
-              >
+              <div className={'flex w-full max-w-2xl flex-col space-y-6'}>
                 {'active' in data ? (
                   <CurrentSubscriptionCard
                     subscription={data}