Bump pip from 23.1.2 to 23.2.1 in /.github/workflows

Bumps [pip](https://github.com/pypa/pip) from 23.1.2 to 23.2.1.
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@23.1.2...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>

.github/workflows/constraints.txt

@@ -1,4 +1,4 @@
-pip==23.1.2
+pip==23.2.1
 nox==2022.11.21
 nox-poetry==1.0.3
 poetry==1.2.2