Update EVM link to point directly to external API reference

Changed link to point directly to https://api-reference.pyth.network/price-feeds/evm/getPriceNoOlderThan as requested

Co-Authored-By: Nidhi Singh <nidhi2894@gmail.com>

Author: 2 people

pages/price-feeds/core/api-reference.mdx

@@ -6,7 +6,7 @@ The API reference is interactive, so developers can try out the APIs from the we
 
 The following on-chain contracts are documented in the API reference:
 
-- [EVM](/price-feeds/core/api-reference/evm)
+- [EVM](https://api-reference.pyth.network/price-feeds/evm/getPriceNoOlderThan)
 
 Hermes also has interactive API documentation hosted by the service itself: