deskutils/kalendar: update to 0.3.1, latest upstream

Release announcement at
	https://claudiocambra.com/2021/11/28/kalendar-v0-3-0-out-soon-with-improved-stability-efficiency-accessibility-and-a-windows-version-kalendar-devlog-23/

The 0.3.0 release didn't build cleanly, 0.3.1 fixes that.