Doc: the macro recorder does not support code completion

Change-Id: Ibf3225f32c2a89f7028554060f73fd89bce86fb4
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

doc/src/editors/creator-editors.qdoc

@@ -937,6 +937,8 @@
     or press \key {Alt+(}. To stop recording, select \gui {Tools > Macros >
     Stop Recording Macro} or press \key {Alt+)}.
 
+    \note The macro recorder does not support code completion.
+
     To play the last macro, select \gui {Tools > Macros > Play Last Macro} or
     press \key {Alt+R}.