docs: update `websocket.md`

[iiio2]

🔗 Linked issue

❓ Type of change

• [x] 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• [ ] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [ ] 👌 Enhancement (improving an existing functionality like performance)
• [ ] ✨ New feature (a non-breaking change that adds functionality)
• [ ] 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

📝 Checklist

• [ ] I have linked an issue or discussion.
• [ ] I have updated the documentation accordingly.

[pi0]

thanks for pr. chaining is possible

[iiio2]

@pi0 , thanks a lot. You said about chaining. I think that is .then() or .catch() stuffs. but in the code it is just returning $fetch("url"). There is no chaining I think. just want to know.

[pi0]

H3 handler itself awaits on whar we return (which is a promise, retuen value of $fetch)

[iiio2]

I see. Thanks @pi0 .