Update Banner copy (#4989)

## Problem solved

Short description of the bug fixed or feature added

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## PR-Codex overview
This PR updates the text of the `label` prop in the `AnnouncementBanner` component to provide a clearer and more concise message about the promotional offer for in-app wallets.

### Detailed summary
- Updated `label` prop in the `AnnouncementBanner` from:
  - 'Get 12 months of unlimited in-app wallets by applying the "FREEWALLETS" coupon in the billing dashboard'
  - To: 'Claim 12 months of free in-app wallets. Use code "FREEWALLETS". Redeem offer by October 31st!'

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Author: MananTank

apps/dashboard/src/components/notices/AnnouncementBanner.tsx

@@ -54,7 +54,7 @@ export function UnlimitedWalletsBanner() {
   return (
     <AnnouncementBanner
       href="/dashboard/settings/billing?coupon=FREEWALLETS"
-      label='Get 12 months of unlimited in-app wallets by applying the "FREEWALLETS" coupon in the billing dashboard'
+      label='Claim 12 months of free in-app wallets. Use code "FREEWALLETS". Redeem offer by October 31st!'
       trackingLabel="unlimited-wallets"
     />
   );