Bump pip from 23.2.1 to 23.3 in /backend (#1047)

Bumps [pip](https://github.com/pypa/pip) from 23.2.1 to 23.3.
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@23.2.1...23.3)

---
updated-dependencies:
- dependency-name: pip
  dependency-type: indirect
...

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Co-authored-by: Faris Durrani <afarisdurrani@gmail.com>