chore(aucmd): replace deprecated on_yank with hl_op - #774

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: JohnnyMorganz/stylua-action@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/