Update docs/api/web-contents.md

Co-authored-by: John Kleinschmidt <jkleinsc@electronjs.org>

docs/api/web-contents.md

@@ -1296,7 +1296,7 @@ Returns [`PrinterInfo[]`](structures/printer-info.md)
   * `pagesPerSheet` Number (optional) - The number of pages to print per page sheet.
   * `collate` Boolean (optional) - Whether the web page should be collated.
   * `copies` Number (optional) - The number of copies of the web page to print.
-  * `pageRanges` Object[] (optional) - The page range to print.
+  * `pageRanges` Object[] (optional) - The page range to print. On macOS, only one range is honored.
     * `from` Number - Index of the first page to print (0-based).
     * `to` Number - Index of the last page to print (inclusive) (0-based).
   * `duplexMode` String (optional) - Set the duplex mode of the printed web page. Can be `simplex`, `shortEdge`, or `longEdge`.