(DOCS-14451): Fix Python getting started link

Author: jeff-allen-mongo

source/index.txt

@@ -51,7 +51,7 @@ MongoDB provides a Getting Started Guide in the following editions:
 
        `Node.JS Edition <http://mongodb.github.io/node-mongodb-native/3.4/quick-start/quick-start/>`_
 
-     - :api:`Python Edition <pymongo>`
+     - :driver:`Python Edition </pymongo>`
 
        `C++ Edition <https://mongodb.github.io/mongo-cxx-driver/mongocxx-v3/tutorial/>`_