Bump pymongo from 4.8.0 to 4.9.1

Bumps [pymongo](https://github.com/mongodb/mongo-python-driver) from 4.8.0 to 4.9.1.
- [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@4.8.0...4.9.1)

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

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

requirements.txt

@@ -1,4 +1,4 @@
-pymongo==4.8.0
+pymongo==4.9.1
 boto3==1.35.18
 requests==2.32.3
 Pillow==10.4.0