The `self-hosted` label that was hardwired to be a LXC container
running `debian:bullseye` was reworked and documented ([user guide](https://forgejo.org/docs/next/user/actions/#jobsjob_idruns-on) and [admin guide](https://forgejo.org/docs/next/admin/actions/#labels-and-runs-on)).
There now are two different schemes: `lxc://` for LXC containers and
`host://` for running directly on the host.
* Support the `host://` scheme for running directly on the host.
* Support the `lxc://` scheme in labels
* Update [code.forgejo.org/forgejo/act v1.14.0](https://code.forgejo.org/forgejo/act/pulls/19) to implement both self-hosted and LXC schemes
* Update [code.forgejo.org/forgejo/act v1.12.0](https://code.forgejo.org/forgejo/runner/pulls/106) to upgrade the node installed in the LXC container to node20
* Update [code.forgejo.org/forgejo/act v1.11.0](https://code.forgejo.org/forgejo/runner/pulls/86) to resolve a bug preventing actions based on node20 from running, such as [checkout@v4](https://code.forgejo.org/actions/checkout/src/tag/v4).