sysutils/conky: update to 1.22.1

ChangeLog: https://github.com/brndnmtthws/conky/releases/tag/v1.22.1

Bug fixes

• Compile cairo_xlib Lua bindings as MODULE
• Add #include to fix building with gcc 15

Miscellaneous

• Bump version
• Update build.sh for switch to newer appimagetool
• [Refactor]: Move sources into subdirectories
• Update blame ignore & labeler
• build(deps): bump DeterminateSystems/magic-nix-cache-action from 8 to 9 in the actions group
• Check whether first_colour is set before using it as foreground color
• Switch Nix installer & cache for CI
• CI: sccache cache keys can be simpler
• Ubuntu 20.04 deprecated
• OpenBSD: Reimplement using bsdcommon.
• Implement -U for OpenBSD.
• Use semicolon as file path separator for lua_load
• Added multi pointer support

Dependencies

• Add compiler cache and fix CMake deprecation warnings