doc: add missing options.signal to readlinePromises.createInterface()

From the source code, `readlinePromises.createInterface()` calls
`new Interface()` imported from `internal/readline/interface`, which
works the same as the non-promise version. If non-promise version
accepts options.signal, it should also work for
`readlinePromises.createInterface()`. Hence this information need to be
indicated in the documentation.

Refs: https://github.com/nodejs/node/blob/main/lib/readline/promises.js
PR-URL: #55456
Reviewed-By: Luigi Pinca <[email protected]>

Author: hkleungai

doc/api/readline.md

@@ -710,6 +710,7 @@ added: v17.0.0
     **Default:** `500`.
   * `tabSize` {integer} The number of spaces a tab is equal to (minimum 1).
     **Default:** `8`.
+  * `signal` {AbortSignal} Allows closing the interface using an AbortSignal.
 * Returns: {readlinePromises.Interface}
 
 The `readlinePromises.createInterface()` method creates a new `readlinePromises.Interface`