deskutils/fet: Update to 5.45.0
From ChangeLog: https://www.lalescu.ro/liviu/fet/news.html
- Slightly improved the code for the constraints of type teacher(s)/students (set) max days per week and teacher(s)/students (set) interval max days per week.
- Corrected a compilation warning appearing with the new gcc 10.1.1.
- Updated the Arabic translation, by Benahmed Abdelkrim.
PR: 247486
Submitted by: uzsolt@uzsolt.hu (maintainer)