Bump pip from 23.0 to 23.2.1 in /.github/workflows (#401)

Bumps [pip](https://github.com/pypa/pip) from 23.0 to 23.2.1.
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@23.0...23.2.1)

---
updated-dependencies:
- dependency-name: pip
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/constraints.txt

@@ -1,5 +1,5 @@
 lockfile<0.13.0,>=0.12.2
-pip==23.0
+pip==23.2.1
 nox==2023.4.22
 nox-poetry==1.0.3
 poetry>=1.2.0