Be able to link to the MongoCryptError workaround

We may not be able to resolve this in PyMongo prior to releasing QE so
let's make this as good as it can be before we can remove it.

Author: aclark4life

docs/howto/queryable-encryption.rst

@@ -93,7 +93,10 @@ The database name of the key vault must be the same as in ``"NAME"``. The
 vault's collection name can be whatever you wish, but by convention, it's often
 ``__keyVault``.
 
-.. admonition:: Dynamic library path configuration
+Dynamic library path configuration
+----------------------------------
+
+.. admonition:: Pymongocrypt.errors.MongoCryptError
 
    If you encounter the following error: