chore(3p/sources): Bump channels & overlays

* //ops/modules/depot-inbox: Adapt to upstream option type declaration.
  See nixpkgs commit b6ed3b8f402893df91a8e21ce993520301c2f076.

* //ops/machines/sanduny, //users/tazjin/polyanka:
  Remove boot.loader.grub.version options (no longer has any effect).

* //users/sterni/emacs: reflect rename emacsPgtk -> emacs-pgtk

* //3p/overlays: update tdlib to match emacs-overlay

* //3p/overlays: give EXWM from depot a separate name

* //users/grfn/system/home: disable Slack support in ntfy

Change-Id: I03bde088bc70e05b23925f244899807210cb7b20
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8547
Autosubmit: sterni <sternenseemann@systemli.org>
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>

users/grfn/system/home/modules/desktop.nix

@@ -10,7 +10,10 @@
   ];
 
   home.packages = with pkgs; [
-    ntfy
+    (ntfy.override {
+      # Slack support is broken as of 2023-06-15
+      withSlack = false;
+    })
   ];
 
   services.syncthing.tray.enable = true;