`check_spicetify_upgrade` renamed to `check_spicetify_update`

[aemogie]

Describe the bug

The option check_spicetify_upgrade was renamed to check_spicetify_update in the PR spicetify/spicetify-cli#2638

My config -

Screenshots -

Desktop (please complete the following information):

• OS/distro: NixOS
• Desktop environment/window manager: Hyprland
• nixpkgs version for my home configuration: unstable
• nixpkgs version for my import of spicetify nix: same as above

Additional context -