Fix python project link (#605)

* fix python project link in CSFLE guide

Author: Chris Cho

source/use-cases/client-side-field-level-encryption-guide.txt

@@ -1036,7 +1036,7 @@ To view and download a runnable example of CSFLE, select your driver below:
       :tabid: python
 
       **GitHub:** `PyMongo CSFLE runnable example
-      <https://github.com/mongodb-university/csfle-guides/python/tree/master/>`_
+      <https://github.com/mongodb-university/csfle-guides/tree/master/python>`_
 
 Move to Production
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