chore: make reference to ecosystem rpc page (#241)

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# Description
- makes reference to ecosystem rpc page in api reference guide

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## Additional context

Co-authored-by: Sarah Schwartz <[email protected]>

content/00.build/70.api-reference/00.index.md

@@ -9,6 +9,10 @@ ZKsync Era seamlessly integrates with the Ethereum ecosystem. To achieve this in
 we support not only the standard <a href="https://ethereum.org/en/developers/docs/apis/json-rpc/" target="_blank">Ethereum JSON-RPC API</a>
 but also introduce L2-specific features that enhance functionality.
 
+ZKsync supports RPC providers that comply with the
+official <a href="https://ethereum.org/en/developers/docs/apis/json-rpc/" target="_blank">Ethereum JSON-RPC API</a> specification.
+You can explore a comprehensive list of supported RPC providers in our [RPC ecosystem page](https://docs.zksync.io/ecosystem/node-providers).
+
 ::callout{icon="i-heroicons-information-circle" color="amber"}
 To ensure a seamless experience, we impose rate limits on both HTTPS and WebSocket APIs.
 Generally, these limits are ample, ranging from 10 to 100 requests per second (RPS) per client.