Use JQ to fix ignore commit workaround

Workarounds were historically included:

• 34e7783f https://hsbxl.be/events/byteweek/2020/
• a6a4c1c5 https://hsbxl.be/events/byteweek/2020/bytenight/
• 39041bd6 for f74768ae https://hsbxl.be/events/software-freedom-day/2021-09-18
• 3e92e422 for 5ffec14b https://hsbxl.be/events/ctutoring/001/