sysutils/pfetch: update to 0.5.0

From ChangeLog: https://github.com/dylanaraps/pfetch/releases/tag/0.5.0

• Added a new simplified dynamic display method. It's smaller in size, uses less escape sequences and is faster overall.
• Added PF_SOURCE to execute a script prior to running pfetch. This allows the user to script things.
• ASCII Art is now bold.
• os: Added support for IRIX, CRUX, OpenWRT and Bedrock Linux.
• host: Fixed incorrect host output.
• host: Added MINIX support.
• wm: Added fallback to non-EWMH WMs .

And many more minor changes.

PR: 244740
Submitted by: vulcan@wired.sh (maintainer)