docs(openapi-react-query): fix useMutation API reference

[ElayGelbart]

Changes

Fixes incorrect API reference for useMutation in openapi-react-query docs

• Updates the example to correctly show useMutation instead of useQuery
• Removes incorrect options parameter that wasn't part of the API

How to Review

The useMutation API reference in docs/openapi-react-query/use-mutation.md now correctly reflects the actual API signature

Checklist

• Unit tests updated
• docs/ updated (if necessary)
• pnpm run update:examples run (only applicable for openapi-typescript)

I've been using this package extensively in my projects and found it incredibly helpful for maintaining type-safe API clients. The React Query integration makes API state management a breeze. Happy to contribute back to this awesome tool!

[changeset-bot]

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[kerwanp]

Looks good to me, thanks! Can you please fix the conflict so we can merge this