doc: type improvement of file http.md

`outgoingMessage.setHeader` and `outgoingMessage.getHeader` section

PR-URL: https://github.com/nodejs/node/pull/58189
Reviewed-By: Ethan Arrowood <ethan@arrowood.dev>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
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yusheng chen 2025-09-14 08:39:24 +08:00 committed by GitHub
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@ -2142,7 +2142,7 @@ added: v0.4.0
-->
* `name` {string}
* Returns: {any}
* Returns: {number | string | string\[] | undefined}
Reads out a header that's already been queued but not sent to the client.
The name is case-insensitive. The type of the return value depends
@ -2277,7 +2277,7 @@ added: v0.4.0
-->
* `name` {string}
* `value` {any}
* `value` {number | string | string\[]}
* Returns: {http.ServerResponse}
Returns the response object.
@ -3228,7 +3228,7 @@ added: v0.4.0
-->
* `name` {string} Name of header
* Returns: {string | undefined}
* Returns: {number | string | string\[] | undefined}
Gets the value of the HTTP header with the given name. If that header is not
set, the returned value will be `undefined`.
@ -3330,7 +3330,7 @@ added: v0.4.0
-->
* `name` {string} Header name
* `value` {any} Header value
* `value` {number | string | string\[]} Header value
* Returns: {this}
Sets a single header value. If the header already exists in the to-be-sent