Fix broken link to off-chain applications

Update link from use-real-time-data/off-chain.md to fetch-price-updates to point to the correct documentation page.

Co-Authored-By: [email protected] <[email protected]>

Author: 2 people

pages/price-feeds/core/use-real-time-data.mdx

@@ -51,6 +51,6 @@ Pyth price feeds can also be used in off-chain applications.
 For example, an application may need to show real-time asset prices on a website.
 Developers building such applications can consult the following guide:
 
-- [Off-chain Apps](use-real-time-data/off-chain.md)
+- [Off-chain Apps](fetch-price-updates)
 
 To fetch historical prices, application developers can check out the [Use Historic Price Data](use-historic-price-data) guide.