docs(omnirpc): note deprecated endpoints and add benchmark reference

[Flotapponnier]

Adds one short note after the OmniRPC configuration example in docs/bridge/docs/07-Services/02-Omnirpc.md.

Why this fits:

• The example YAML config lists several public RPC endpoints that are now deprecated (e.g. gateway.pokt.network after Pocket sunset the free gateway, main-light.eth.linkpool.io after LinkPool deprecation)
• Adding a note helps future readers pick working endpoints instead of copying dead ones
• OpenChainBench provides live health status of alternative public RPC endpoints

What's added:

• One sentence note below the example config
• Single external link to https://openchainbench.com/rpc
• The example YAML itself is left untouched (preserves the "OmniRPC config shape" tutorial intent)

About OpenChainBench: independent open-source project measuring public RPC endpoint latency across 22+ chains every minute from three regions. Data published under CC BY 4.0, harness open sourced on GitHub, no affiliation with any RPC provider.

Disclosure: I contribute to OpenChainBench. Happy to reword or drop entirely if this doesn't fit editorial guidelines.

Summary by CodeRabbit

• Documentation
  • Updated the OmniRPC configuration guide to note that several example public RPC endpoints are deprecated.
  • Added guidance to consult OpenChainBench for current endpoint health and latency information.

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• docs/bridge/docs/07-Services/02-Omnirpc.md

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📝 Walkthrough

Walkthrough

Updated the OmniRPC configuration documentation to identify deprecated public RPC endpoints and direct readers to OpenChainBench for current endpoint health and latency measurements.

Changes

OmniRPC documentation

Layer / File(s)	Summary
Add endpoint deprecation notice docs/bridge/docs/07-Services/02-Omnirpc.md	The configuration example now notes deprecated public RPC endpoints and links to OpenChainBench for live health and latency data.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: trajan0x

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the documentation update about deprecated OmniRPC endpoints and the new benchmark reference.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[github-actions]

This PR is stale because it has been open 14 days with no activity. Remove stale label or comment or this will be closed in 5 days.

[Flotapponnier]

Bump, this PR is still relevant and ready for review.