Bump pyiron-potentialfit from 0.2.0 to 0.3.2

Bumps [pyiron-potentialfit](https://github.com/pyiron/pyiron_potentialfit) from 0.2.0 to 0.3.2.
- [Release notes](https://github.com/pyiron/pyiron_potentialfit/releases)
- [Commits](pyiron/pyiron_potentialfit@pyiron_potentialfit-0.2.0...pyiron_potentialfit-0.3.2)

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

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

requirements.txt

@@ -7,7 +7,7 @@ pyiron_experimental==0.0.3
 pyiron_workflow==0.9.0
 pyiron-gpl==0.0.5
 pyiron_snippets==0.1.1
-pyiron_potentialfit==0.2.0
+pyiron_potentialfit==0.3.2
 calphy==1.3.8
 damask==3.0.0a8
 fenics==2019.1.0