Replace a hardcoded version number on pymongo docs link

(cherry picked from commit 82d1787)

Author: timgraham

source/connect.txt

@@ -95,7 +95,7 @@ This nested dictionary has the following keys:
    * - **OPTIONS**
      - | A dictionary of additional connection options for the database. This key is optional.
        | To see a full list of connection options that you can set in the ``OPTIONS`` key,
-         see the optional parameters for `MongoClient <https://pymongo.readthedocs.io/en/4.10.1/api/pymongo/mongo_client.html#pymongo.mongo_client.MongoClient>`__
+         see the optional parameters for `MongoClient <https://pymongo.readthedocs.io/en/stable/api/pymongo/mongo_client.html#pymongo.mongo_client.MongoClient>`__
          in the PyMongo API documentation.
 
 .. _django-manual-config-example: