sysutils/conky: update to 1.20.1

Bugfix over the short-lived 1.20.0

ChangeLog: https://github.com/brndnmtthws/conky/releases/tag/v1.20.0

Features

• Build AppImage separately per OS
• Rotate appimage signing key
• Add/use clang 15 on ubuntu builds
• Define text_object.data.l as "long long"
• Bump web deps, fix lint
• Updated flake per NixOS/nix#5532
• Fix bad imlib2 typedefs for imlib<1.10
• Use --force with brew install, block upgrades
• Tidy up docs
• Update README.md
• Update README.md
• Handle external PropertyNotify events
• Label dependency changes
• Tweak XSendEvent arguments
• Add modified date to web docs
• Improve documentation for window types and hints
• Refactor x11 event handling
• Issue template: Link docs to obtain stack traces
• Exclusive XInput event handling

Bug fixes

• Enable wayland in appimage build
• Fix regression in lua_load path handling
• Lua imlib2 fixes
• Increase max length of ACPI temp (fixes #977)
• Skip propagation of non-input events
• Fix render order in draw_stuff
• Fix event propagation on Openbox
• Fix missing y_abs argument copy