Update roles/custom/matrix-synapse/templates/synapse/homeserver.yaml.j2

Co-authored-by: Slavi Pantaleev <slavi@devture.com>

roles/custom/matrix-synapse/templates/synapse/homeserver.yaml.j2

@@ -2639,7 +2639,7 @@ user_directory:
     # Uncomment to prefer local over remote users in user directory search
     # results.
     #
-    prefer_local_users: {{ matrix_synapse_prefer_local_users|to_json }}
+    prefer_local_users: {{ matrix_synapse_user_directory_prefer_local_users | to_json }}
 
 
 # User Consent configuration