cool, that one wasn't on the waybackmachine either, so i archived it today.
https://web.archive.org/web/20260506155237/https://raw.githubusercontent.com/bitcoin/bitcoin/68b973a913fd1569d3a9a444d4233b15f7866e3e/rc/bitcoin.ico

and your link

https://web.archive.org/web/20260506155431/https://github.com/bitcoin/bitcoin/blob/68b973a913fd1569d3a9a444d4233b15f7866e3e/rc/bitcoin.ico