Fix broken EVM API reference link

Changed relative link to absolute path to properly resolve to external API reference via redirect

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

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](api-reference/evm)
+- [EVM](/price-feeds/core/api-reference/evm)
 
 Hermes also has interactive API documentation hosted by the service itself: