Bump pymatgen from 2025.6.14 to 2025.10.7 (#1317)

Bumps [pymatgen](https://github.com/materialsproject/pymatgen) from 2025.6.14 to 2025.10.7.
- [Release notes](https://github.com/materialsproject/pymatgen/releases)
- [Changelog](https://github.com/materialsproject/pymatgen/blob/master/docs/CHANGES.md)
- [Commits](materialsproject/pymatgen@v2025.6.14...v2025.10.7)

---
updated-dependencies:
- dependency-name: pymatgen
  dependency-version: 2025.10.7
  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>
Co-authored-by: Aaron Kaplan <33381112+esoteric-ephemera@users.noreply.github.com>

Author: dependabot[bot]

pyproject.toml

@@ -100,7 +100,7 @@ strict-openff = [
     "monty==2025.3.3",
     "openmm-mdanalysis-reporter==0.1.0",
     "openmm==8.3.1",
-    "pymatgen==2025.6.14", # EXERCISE CAUTION WHEN UPDATING - open ff is extremely sensitive to pymatgen version
+    "pymatgen==2025.10.7", # EXERCISE CAUTION WHEN UPDATING - open ff is extremely sensitive to pymatgen version
 ]
 strict-forcefields = [
     "calorine==3.2; python_version >= '3.12'",