Bump pymongo from 4.4.0 to 4.6.3

Bumps [pymongo](https://github.com/mongodb/mongo-python-driver) from 4.4.0 to 4.6.3.
- [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@4.4.0...4.6.3)

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

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

requirements.txt

@@ -1,5 +1,5 @@
 monty==2022.9.9
 pymatgen==2023.7.14
-pymongo==4.4.0
+pymongo==4.6.3
 pybtex==0.24.0
 ruamel.yaml==0.17.32