Fix link to C driver CSFLE tutorial (#3421)

(cherry picked from commit 619de53beb4f3321394b66a0f0d42489281b7e3d)

Author: Chris Cho

source/core/csfle/reference/compatibility.txt

@@ -60,7 +60,7 @@ versions or later:
 
    * - :driver:`C </c/>`
      - ``1.17.5``
-     - `C Driver Client-Side Field Level Encryption <http://mongoc.org/libmongoc/current/using_client_side_encryption.html>`__
+     - `C Driver Client-Side Field Level Encryption <https://mongoc.org/libmongoc/current/client-side-field-level-encryption.html>`__
 
    * - :driver:`Go </go>`
      - ``1.2+``