Bump pymatgen from 2023.11.12 to 2023.12.18

Bumps [pymatgen](https://github.com/materialsproject/pymatgen) from 2023.11.12 to 2023.12.18.
- [Release notes](https://github.com/materialsproject/pymatgen/releases)
- [Changelog](https://github.com/materialsproject/pymatgen/blob/master/docs/CHANGES.md)
- [Commits](materialsproject/pymatgen@v2023.11.12...v2023.12.18)

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

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

pyproject.toml

@@ -35,7 +35,7 @@ classifiers = [
 ]
 dependencies = [
     "numpy==1.26.2",
-    "pymatgen==2023.11.12",
+    "pymatgen==2023.12.18",
     "mp-api==0.37.5",
     "ase",
     "tqdm",