Fix typo

roles/matrix-postgres/tasks/validate_config.yml

@@ -13,7 +13,7 @@
 - name: Fail if required Postgres settings not defined
   fail:
     msg: >
-      You need to define a required configuration setting (`{{ item }}`) for using mxisd.
+      You need to define a required configuration setting (`{{ item }}`).
   when: "vars[item] == ''"
   with_items:
     - "matrix_postgres_connection_hostname"