Add 2804 study session

[github-actions[bot]]

🎊 PR Preview 125422a551504c690a6242d100f1c7f3782c5027 has been successfully built and deployed to https://CarletonComputerScienceSociety-website-build_preview-pr-465.surge.sh

:clock1: Build time: 0.013s

_{🤖 By surge-preview}

[github-actions[bot]]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 5.7%, saving 6.26 KB.

Filename	Before	After	Improvement	Visual comparison
static/images/event_posters/2023-2024/comp_2804_study_session_final.jpg	109.30 KB	103.04 KB	-5.7%	View diff

463 images did not require optimisation.

[ryangchung]

LGTM