Fix redirects for off-chain applications page

Update legacy redirects to point to the correct fetch-price-updates page:
- Updated /documentation/pythnet-price-feeds/off-chain redirect
- Added new redirect for /price-feeds/use-real-time-data/off-chain

This ensures legacy URLs and external references correctly redirect to
/price-feeds/core/fetch-price-updates instead of the non-existent
/price-feeds/use-real-time-data/off-chain path.

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

Author: 2 people

next.config.js

@@ -94,7 +94,11 @@ const permanentRedirectArray = [
   ],
   [
     "/documentation/pythnet-price-feeds/off-chain",
+    "/price-feeds/core/fetch-price-updates",
+  ],
+  [
     "/price-feeds/use-real-time-data/off-chain",
+    "/price-feeds/core/fetch-price-updates",
   ],
   [
     "/documentation/pythnet-price-feeds/evm",