Doc: fix typo

Change-Id: I2e6d071f1772d58ce4be4e539afd22f779829a3f
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@nokia.com>

doc/src/overview/creator-overview.qdoc

@@ -97,7 +97,7 @@
 
                 \QC is integrated to several external native debuggers: GNU
                 Symbolic Debugger (GDB), Microsoft Console Debugger (CDB), and
-                and internal JavaScript debugger. In the \gui Debug mode, you
+                internal JavaScript debugger. In the \gui Debug mode, you
                 can inspect the state of your application while debugging.
 
                 The memory and CPU power available on devices are limited and