fix(hermes)-add-beta-endpoint (#533)

* fix(hermes)-add-beta-endpoint

* pre-commit

Author: aditya520

pages/price-feeds/api-instances-and-providers/hermes.mdx

@@ -1,3 +1,5 @@
+import { Callout } from "nextra/components";
+
 # Hermes
 
 Hermes is an open-source service that listens to the Pythnet and the Wormhole Network for Pyth price updates, and
@@ -13,6 +15,13 @@ Network:
 
 URL: https://hermes.pyth.network
 
+<Callout type="info" emoji="⚠️">
+For developers building on **Aptos testnet**, **Sui testnet** or **Near testnet**, please use the Hermes Beta endpoint:
+
+URL: https://hermes-beta.pyth.network
+
+</Callout>
+
 For production deployments, developers integrating with Pyth Network are **strongly encouraged** to use Node Providers
 for maximum resilience and decentralization. Moreover, Hermes is designed to be self-hosted, so developers can run their own
 instance of Hermes to fetch Pyth price updates. Please note it is not recommended to use the public endpoint for production as it has rate limits.