Update django version to 4.2.16

[mdadighat]

Django version needed to be updated to the current LTS version (some of the packages aren't compatible with 5.1.1 yet anyway so no need to use the most recent version available).

Jira issue: SOR-99

[github-actions[bot]]

Coverage Report

File	Stmts	Miss	Cover	Missing
manage.py	12	12	0%	2–22
repository
forms.py	88	13	85%	50–51, 417, 423, 463–473
models.py	96	1	99%	155
tasks.py	78	18	77%	80–83, 89–90, 119–120, 205, 208–211, 218, 226–232
utils.py	172	33	81%	71, 145, 147, 149, 151, 153, 156–157, 173–174, 195–200, 204–209, 228–249, 385–407
views.py	261	168	36%	39, 59–64, 72–95, 98–117, 167–187, 216–254, 305, 312–320, 324–326, 330–334, 338–360, 364–366, 376–427, 459–482, 510–609
repository/tests
tests_models.py	164	17	90%	102, 107, 112, 117, 213, 221–222, 229, 235, 252, 260, 272, 280, 292, 304, 316, 322
score
asgi.py	4	4	0%	10–16
wsgi.py	6	6	0%	10–18
score/settings
base.py	48	13	73%	13–32
TOTAL	1283	285	78%

Tests	Skipped	Failures	Errors	Time
46	0 :zzz:	0 :x:	0 :fire:	13.286s :stopwatch: