This update for virtme fixes the following issues:

- Update to 1.40:
  * No significant change, this is just a very small hotfix release
    to solve a packaging problem introduced by a conflict with the
    new vng-mcp tool.
  * While at it, there're also some small improved hints in the MCP
    server, so that AI agents can better understand how to build
    the kernel using vng --build.