Update docs/sdk-and-tools/rest-api/iterate-keys.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: danidrasovean

docs/sdk-and-tools/rest-api/iterate-keys.md

@@ -144,7 +144,7 @@ This endpoint will only work if the node's `config.toml` file has the following
 - The `pairs` object contains hex-encoded keys and values. Decode as needed.
 - Always pass `newIteratorState` as-is in your next request's `iteratorState` field to continue iteration.
 - When `newIteratorState` is null, all keys have been retrieved.
-- If `iteratorState` is empty in the request, iteration starts from the beginning of the trie.
+- If `iteratorState` is an empty array (`[]`) in the request, iteration starts from the beginning of the trie.
 - If `numKeys` is 0, the server will return as many keys as possible until all are retrieved or until the `TrieOperationsDeadlineMilliseconds` timeout is reached.
 - If retrieving `numKeys` takes more time than the timeout, the request will return the keys collected up to that point.
 - Use `?blockNonce={blockNonce}` to ensure all requests iterate the same trie root, even if the account changes between requests.