chore(users/sterni/emacs): use Emacs 29 instead of unstable r/6476

This means we can subtitute the base package for my emacs derivation
instead of compiling it from scratch (which is quite slow).

This means I'll be using 29.1-rc1 until
https://github.com/NixOS/nixpkgs/pull/246203 or
https://github.com/NixOS/nixpkgs/pull/247496 are merged which is okay,
as it includes pgtk support.

Change-Id: Ie7cfec1ca0df9974c049be0b00d75f32143ac905
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9065
Autosubmit: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>

0 files changed, 0 insertions, 0 deletions