Bump pymongo from 4.3.3 to 4.6.3 in /embedding

Bumps [pymongo](https://github.com/mongodb/mongo-python-driver) from 4.3.3 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@4.3.3...4.6.3)

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

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

embedding/requirements.txt

@@ -7,7 +7,7 @@ fastapi==0.109.1
 joblib==1.2.0
 nltk==3.8.1
 numpy==1.20 # needs to be 1.20 because after that, np.int does not exist any more, which breaks nltk
-pymongo==4.3.3
+pymongo==4.6.3
 requests==2.31.0
 scikit-learn==0.22 # needs to be 0.22 because after that, sklearn.utils.linear_assignment_ is removed, which breaks allennlp
 scipy==1.10.0