Update pymongo requirement from <=4.10.1 to <=4.15.3

Updates the requirements on [pymongo](https://github.com/mongodb/mongo-python-driver) to permit the latest version.
- [Release notes](https://github.com/mongodb/mongo-python-driver/releases)
- [Changelog](https://github.com/mongodb/mongo-python-driver/blob/master/doc/changelog.rst)
- [Commits](mongodb/mongo-python-driver@0.4pre...4.15.3)

---
updated-dependencies:
- dependency-name: pymongo
  dependency-version: 4.15.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -35,7 +35,7 @@ dependencies = [
     "pydantic-settings>=2.0.3",
     "pydantic>=2.0.1",
     "pymatgen>=2024.11.13,<2025.10.7",
-    "pymongo<=4.10.1",
+    "pymongo<=4.15.3",
 ]
 
 [project.optional-dependencies]