gnome: update gnome-shell flake input

[0xda157]

it is currently locked to ef02db02bf0ff342734d525b5767814770d85b49 with the following note:

# TODO: Unlocking the input and pointing to official repository requires
# updating the patch:
# https://github.com/nix-community/stylix/pull/224#discussion_r1460339607.

it needs to be updated to at least the 50.1 tag before we can release 26.05.

[0xda157]

diff --git a/flake.nix b/flake.nix
index 24c4191a..ceb856da 100644
--- a/flake.nix
+++ b/flake.nix
@@ -51,7 +51,7 @@
       # TODO: Unlocking the input and pointing to official repository requires
       # updating the patch:
       # https://github.com/nix-community/stylix/pull/224#discussion_r1460339607.
-      url = "github:GNOME/gnome-shell/ef02db02bf0ff342734d525b5767814770d85b49";
+      url = "github:GNOME/gnome-shell/50.1";
       flake = false;
     };

just applying the above patch results in the following error:

error: Cannot build '/nix/store/f8wfan1mi1dkag7d9ffmfz1brnpyrf57-catppuccin-macchiato-gnome-shell-theme.drv'.
       Reason: builder failed with exit code 65.
       Output paths:
         /nix/store/lwnli0pz5fdr5gyg5r8pb5l2gwihbcs7-catppuccin-macchiato-gnome-shell-theme
       Last 17 log lines:
       > Running phase: unpackPhase
       > unpacking source archive /nix/store/dfcmmqqfgvgsnphafl5hb48i9k65p4qn-source
       > source root is source
       > Running phase: patchPhase
       > applying patch /nix/store/h37qaglxkyyqhgh2clz4k9lmwc77gcf4-shell_colors.patch
       > patching file data/gnome-shell-theme.gresource.xml
       > patching file data/theme/gnome-shell-sass/_common.scss
       > patching file data/theme/gnome-shell-sass/widgets/_calendar.scss
       > Running phase: updateAutotoolsGnuConfigScriptsPhase
       > Running phase: configurePhase
       > no configure script, doing nothing
       > Running phase: buildPhase
       > Error: Undefined variable: "$card_insensitive_fg_color".
       >         on line 169 of data/theme/gnome-shell-sass/widgets/_calendar.scss
       >         from line 19 of data/theme/gnome-shell-sass/_widgets.scss
       >         from line 7 of data/theme/gnome-shell-light.scss
       >   Use --trace for backtrace.
       For full logs, run:
         nix log /nix/store/f8wfan1mi1dkag7d9ffmfz1brnpyrf57-catppuccin-macchiato-gnome-shell-theme.drv

[malikwirin]

So card_insensitive_fg_color needs do be defined in the different themes?
in https://github.com/tinted-theming/schemes?

[trueNAHO]

So card_insensitive_fg_color needs do be defined in the different themes?
in https://github.com/tinted-theming/schemes?

See commit 1975269 ("gnome: update to GNOME 46 (#357)") as an example.