Update FB_OUTPUT_DIMMER_MQTT docs

docs/FunctionBlocks/FB_OUTPUT_DIMMER_MQTT.md

@@ -158,7 +158,7 @@ The above illustrates an integration with [FB_INPUT_PUSHBUTTON_MQTT](./FB_INPUT_
 FB_AO_DIMMER_001(SINGLE:=   FB_DI_PB_041.SINGLE,    (* for toggling the output Q *)
     LONG:=                  FB_DI_PB_041.LONG,      (* for controlling the dimmer output OUT *)
     P_LONG:=                FB_DI_PB_041.P_LONG,    (* for controlling the dimmer output OUT *)
-    Q_OUT:=                 AO_001,                 (* couple the function block to the physical anolog output *)
+    Q_OUT=>                 AO_001,                 (* couple the function block to the physical anolog output *)
     VAL:=                   255,                    (* value to set on output OUT when input SET is high *)
     SET:=                   FB_DI_PB_041.DOUBLE     (* when high, VAL is set on output OUT *)
 );