Bump pip from 23.2.1 to 23.3

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: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -160,7 +160,7 @@ splinter==0.19.0
 pytest-splinter==3.3.2
 pytest-django==4.5.2
 setuptools>=59.1.1,<68.3.0
-pip==23.2.1
+pip==23.3
 Twisted==23.8.0
 pixelmatch==0.3.0
 factory-boy==3.3.0