🐛 ListView grey bug in course browser

[iqfareez]

Steps to reproduce

1. Open Course Browser
2. Choose KICT, year 21/22, sem 3.

https://user-images.githubusercontent.com/60868965/195074001-29d784ab-7892-4901-8fd9-aea048566546.mp4

[iqfareez]

Another occurrence:

[iqfareez]

Running in Debug mode, the error I'm getting is

flutter: ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
flutter: The following RangeError was thrown building Builder(dirty):
flutter: RangeError (index): Invalid value: Not in inclusive range 0..6: 98
...

This is related to https://github.com/iqfareez/albiruni/issues/1

[iqfareez]