chore(deps): bump django from 3.0.7 to 4.2.16 in /back-end

Bumps [django](https://github.com/django/django) from 3.0.7 to 4.2.16.
- [Commits](django/django@3.0.7...4.2.16)

---
updated-dependencies:
- dependency-name: django
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

back-end/Pipfile

@@ -10,7 +10,7 @@ v = {editable = true,version = "*"}
 
 [packages]
 autopep8 = "~=1.5"
-django = "~=3.0.7"
+django = "~=4.2.16"
 pandas = "~=1.0.1"
 python-dotenv = "~=0.12.0"
 networkx = "~=2.4"