Bump pyjwt from 2.0.1 to 2.4.0 in /Backend/requirements

Bumps [pyjwt](https://github.com/jpadilla/pyjwt) from 2.0.1 to 2.4.0.
- [Release notes](https://github.com/jpadilla/pyjwt/releases)
- [Changelog](https://github.com/jpadilla/pyjwt/blob/master/CHANGELOG.rst)
- [Commits](jpadilla/pyjwt@2.0.1...2.4.0)

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

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Author: dependabot[bot]

Backend/requirements/base.txt

@@ -39,7 +39,7 @@ pre-commit==2.12.1
 psycopg2==2.8.6
 py==1.10.0
 pycparser==2.20
-PyJWT==2.0.1
+PyJWT==2.4.0
 pyparsing==2.4.7
 pytest-factoryboy==2.1.0
 python-dateutil==2.8.1