chore(deps): Update pip requirement in /packages/@jsii/python-runtime

Updates the requirements on [pip](https://github.com/pypa/pip) to permit the latest version.
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@23.2...23.3)

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

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

packages/@jsii/python-runtime/requirements.txt

@@ -1,6 +1,6 @@
 black~=23.3
 mypy==1.4.1
-pip~=23.2
+pip~=23.3
 pytest~=7.4
 pytest-mypy~=0.10
 setuptools~=68.0.0