Bump pymatgen from 2024.1.27 to 2024.2.20

Bumps [pymatgen](https://github.com/materialsproject/pymatgen) from 2024.1.27 to 2024.2.20.
- [Release notes](https://github.com/materialsproject/pymatgen/releases)
- [Changelog](https://github.com/materialsproject/pymatgen/blob/master/docs/CHANGES.md)
- [Commits](materialsproject/pymatgen@v2024.1.27...v2024.2.20)

---
updated-dependencies:
- dependency-name: pymatgen
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -1,4 +1,4 @@
-pymatgen==2024.1.27
+pymatgen==2024.2.20
 scipy==1.12.0
 monty==2024.2.26
 matplotlib==3.8.2