Bump pymongo from 4.1.1 to 4.6.3 in /crawler

Bumps [pymongo](https://github.com/mongodb/mongo-python-driver) from 4.1.1 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@4.1.1...4.6.3)

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

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

crawler/requirements.txt

@@ -1,4 +1,4 @@
 paramiko==2.11.0
-pymongo==4.1.1
+pymongo==4.6.3
 
 ../library/