graphics/xaos: update to 4.1

From ChangeLog: https://github.com/xaos-project/XaoS/releases/tag/release-4.1

New Features

• Added option to show Cartesian coordinate grid.
• Custom palette helps visualizing palette before applying changes through slider selectable values now.
• PNGs exported using 'Save Image' option can be imported back and users can continue zooming on it.

Bug Fixes

• Fixed crash on recording XaoS animations.
• Fixed crash on rendering using command line.
• Fix handling non-ASCII paths on Windows.
• Only error messages are shown on incorrect commands.
• Some other small bug fixes.

Reported by: portscout
MFH: 2020Q3 (runtime fixes)