nixos/doc/rl-2411: Don't mention nemo layer-shell change (#337854)

- The hooks `yarnConfigHook` and `yarnBuildHook` were added. These should replace `yarn2nix.mkYarnPackage` and other `yarn2nix` related tools. The motivation to get rid of `yarn2nix` tools is the fact that they are too complex and hard to maintain, and they rely upon too much Nix evaluation which is problematic if import-from-derivation is not allowed (see more details at [#296856](https://github.com/NixOS/nixpkgs/issues/296856). The transition from `mkYarnPackage` to `yarn{Config,Build}Hook` is tracked at [#324246](https://github.com/NixOS/nixpkgs/issues/324246).

- Cinnamon has been updated to 6.2.

  - Following Mint 22 defaults, the Cinnamon module no longer ships geary and hexchat by default.

  - Nemo is now built with gtk-layer-shell support, note that for now it will be expected to see nemo-desktop

    listed as a regular entry in Cinnamon Wayland session's window list applet.

- Cinnamon has been updated to 6.2, please check [upstream announcement](https://www.linuxmint.com/rel_wilma_whatsnew.php) for more details.

  Following Mint 22 defaults, the Cinnamon module no longer ships geary and hexchat by default.

- The `shadowstack` hardening flag has been added, though disabled by default.