fix: requirements.txt to reduce vulnerabilities

The following vulnerabilities are fixed by pinning transitive dependencies:
- https://snyk.io/vuln/SNYK-PYTHON-DJANGO-8456315
- https://snyk.io/vuln/SNYK-PYTHON-DJANGO-8456316

requirements.txt

@@ -24,7 +24,7 @@ django-slack==5.19.0
 git+https://github.com/DefectDojo/django-tagging@develop#egg=django-tagging
 django-watson==1.6.3
 django-prometheus==2.3.1
-Django==4.1.13
+Django==4.2.17
 djangorestframework==3.14.0
 html2text==2024.2.26
 humanize==4.9.0