sysutils/conky{-awesome}: update to 0.120.2

ChangeLog: https://github.com/brndnmtthws/conky/releases/tag/v1.20.2

Features

• Separate cairo-xlib.h Lua bindings from cairo.h
• Cleanup build flags, global namespace and includes
• Use perfect hash (gperf) for parsing color names
• set_struts improvements

Bug fixes

• Fix imlib_cache_size_setting::lua_setter

Miscellaneous

• Bump version
• Annoyingly, the artifacts go into a subdir
• Always run Nix & AppImage builds on PRs
• Track more context labels
• Fix matrix URL
• Revert "Fix matrix URL"
• Fix web components and pages (UI)