Bump pymongo from 4.5.0 to 4.6.1 (#1585)

Bumps [pymongo](https://github.com/mongodb/mongo-python-driver) from 4.5.0 to 4.6.1.
- [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@4.5.0...4.6.1)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Joe Hamman <[email protected]>

Author: dependabot[bot]

requirements_dev_optional.txt

@@ -11,7 +11,7 @@ azure-storage-blob==12.16.0 # pyup: ignore
 redis==5.0.1
 types-redis
 types-setuptools
-pymongo==4.5.0
+pymongo==4.6.1
 # optional test requirements
 coverage
 pytest-cov==4.1.0