chore: fix code style

apps/emqx_dashboard_sso/src/emqx_dashboard_sso_ldap.erl

@@ -133,7 +133,7 @@ login(
             of
                 {ok, #{result := ok}} ->
                     ensure_user_exists(Username);
-                {ok, #{result := invalidCredentials} = Reason} ->
+                {ok, #{result := 'invalidCredentials'} = Reason} ->
                     {error, Reason};
                 {error, _} = Error ->
                     Error

apps/emqx_ldap/src/emqx_ldap_bind_worker.erl

@@ -81,8 +81,8 @@ on_query(
                 #{result => ok}
             ),
             {ok, #{result => ok}};
-        {error, invalidCredentials} ->
-            {ok, #{result => invalidCredentials}};
+        {error, 'invalidCredentials'} ->
+            {ok, #{result => 'invalidCredentials'}};
         {error, Reason} ->
             ?SLOG(
                 error,