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.
- [Release notes](https://github.com/pypa/pip/releases)
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@23.0...23.1)

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

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

Author: dependabot[bot]

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

@@ -1,6 +1,6 @@
 black~=23.3
 mypy==1.1.1
-pip~=23.0
+pip~=23.1
 pytest~=7.2
 pytest-mypy~=0.10
 setuptools~=67.3.2