Update pip requirement from ~=23.1 to ~=23.2 (#281)

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@23.1...23.2)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -1,4 +1,4 @@
-pip~=23.1
+pip~=23.2
 voila~=0.3.6
 matplotlib~=3.6.3
 numpy~=1.25.1