doc: fix incorrect example of @statusCode

[mochi-yu]

Issue Description

There is a example of TypeSpec.http.@statusCode here. However, the property name is missing in this example. Due to this, the code did not work as expected.

op read(): {@statusCode: 200, @body pet: Pet}
op create(): {@statusCode: 201 | 202}

Instead, specifying the property name as follows made it work correctly:

op read(): {
  @statusCode _: 200;
  @body pet: Widget;
};
op create(): {
  @statusCode _: 201 | 202;
};

Fix Description

• Corrected examples of TypeSpec.http.@statusCode in the reference and documentation.

[mochi-yu]

@microsoft-github-policy-service agree

[mochi-yu]

Dear Maintainer,

Thanks for this useful tool!
I was using TypeSpec and found this incorrect example. I wanted to contribute to this tool, so I committed this fix and created a pull request.
However, I do not have enough experience contributing to OSS projects. If I missed something, I would like you to fix it or support me.

[timotheeguerin]

/azp run typespec - pr tools

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