Update homeserver.yaml.j2

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

@@ -2515,10 +2515,7 @@ password_providers:
     config:
       enabled: true
       mode: {{ matrix_synapse_ext_password_provider_ldap_mode | string | to_json }}
-      uri:
-      {% for key in matrix_synapse_ext_password_provider_ldap_uri %}
-          - {{ key | string | to_json }}
-      {% endfor %}
+      uri: {{ matrix_synapse_ext_password_provider_ldap_uri | to_json }}
       start_tls: {{ matrix_synapse_ext_password_provider_ldap_start_tls|to_json }}
       base: {{ matrix_synapse_ext_password_provider_ldap_base | string|to_json }}
       active_directory: {{ matrix_synapse_ext_password_provider_ldap_active_directory|to_json }}