build(deps-dev): bump uncertainties from 3.1.7 to 3.2.1

Bumps [uncertainties](https://github.com/lmfit/uncertainties) from 3.1.7 to 3.2.1.
- [Release notes](https://github.com/lmfit/uncertainties/releases)
- [Changelog](https://github.com/lmfit/uncertainties/blob/master/CHANGES.rst)
- [Commits](lmfit/uncertainties@3.1.7...3.2.1)

---
updated-dependencies:
- dependency-name: uncertainties
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

requirements-dev.txt

@@ -161,7 +161,7 @@ tqdm==4.66.3
 types-attrs==19.1.0
 typing-extensions==4.11.0
     # via mypy
-uncertainties==3.1.7
+uncertainties==3.2.1
     # via lmfit
 urllib3==2.2.2
     # via requests