Fix typo

Change-Id: Ib72667f1360e190b15eac187b46fc563b9f65524
Reviewed-on: https://gerrit.libreoffice.org/73419
Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

forms/qa/complex/forms/CheckOGroupBoxModel.java

@@ -113,7 +113,7 @@ public class CheckOGroupBoxModel
             }
         } // endfor
 
-        //get a array of bound properties
+        //get an array of bound properties
         String[] testPropsNames = tNames.toArray(new String[tNames.size()]);
         return testPropsNames;
     }