doc: clarify dns.lookup() callback signature when all is true

Document the `addresses` argument returned by the callback when
`options.all` is true, and note that `address` and `family` are
not provided in that case. Fixes #57355

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: galaxy4276

doc/api/dns.md

@@ -277,9 +277,15 @@ changes:
 * `callback` {Function}
   * `err` {Error}
   * `address` {string} A string representation of an IPv4 or IPv6 address.
+    Not provided when `options.all` is `true`.
   * `family` {integer} `4` or `6`, denoting the family of `address`, or `0` if
     the address is not an IPv4 or IPv6 address. `0` is a likely indicator of a
     bug in the name resolution service used by the operating system.
+    Not provided when `options.all` is `true`.
+  * `addresses` {Object\[]} An array of address objects when `options.all` is
+    `true`. Each object has the following properties:
+    * `address` {string} A string representation of an IPv4 or IPv6 address.
+    * `family` {integer} `4` or `6`, denoting the family of `address`.
 
 Resolves a host name (e.g. `'nodejs.org'`) into the first found A (IPv4) or
 AAAA (IPv6) record. All `option` properties are optional. If `options` is an