Bump pip from 23.2.1 to 23.3.1 in /.github/workflows

Bumps [pip](https://github.com/pypa/pip) from 23.2.1 to 23.3.1.
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@23.2.1...23.3.1)

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

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

Author: dependabot[bot]

.github/workflows/constraints.txt

@@ -1,4 +1,4 @@
-pip==23.2.1
+pip==23.3.1
 nox==2023.4.22
 nox-poetry==1.0.3
 poetry==1.6.1