Fix nix build, update flake.lock

[AtaraxiaSjel]

At the moment, the hyprpaper build is failing with the following error:

In file included from /build/x9p86pbqbvwry48qacajgfyk8zd2sxir-source/src/render/../defines.hpp:3,
                 from /build/x9p86pbqbvwry48qacajgfyk8zd2sxir-source/src/render/LayerSurface.hpp:3,
                 from /build/x9p86pbqbvwry48qacajgfyk8zd2sxir-source/src/render/LayerSurface.cpp:1:
/build/x9p86pbqbvwry48qacajgfyk8zd2sxir-source/src/render/../includes.hpp:30:10: fatal error: GLES3/gl32.h: No such file or directory
   30 | #include <GLES3/gl32.h>
      |          ^~~~~~~~~~~~~~
compilation terminated.

Fixed the problem by adding libGL to buildInputs. Also updated flake.lock to the latest nixos-23.11.