[Docs Bug 🐞 report]: operation object example incorrect

[ababkin]

Describe the bug you found in AsyncAPI Docs.

it specifically says:
"It MUST contain a subset of the messages defined in the channel referenced in this operation, and MUST NOT point to a subset of message definitions located in the Messages Object in the Components Object or anywhere else."

but then the example later reads:

messages:
  - $ref: '#/components/messages/userSignedUp'

this example breaks and is fixed if i follow the original suggestion to reference from the channel messages and not from component messages

Attach any resources that can help us understand the issue.

https://www.asyncapi.com/docs/reference/specification/v3.0.0#channelsObject

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[github-actions]

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