Fix typo

Change-Id: Ied41845bd6c2e42e14a16c72c1e7d3a527502375
Reviewed-on: https://gerrit.libreoffice.org/72261
Tested-by: Jenkins
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>

desktop/source/migration/migration_impl.hxx

@@ -81,7 +81,7 @@ inline bool areBothOpenFrom(OUString const & cmd1, OUString const & cmd2)
 
 /**
     define the item, e.g.:menuitem, toolbaritem, to be migrated. we keep the information
-    of the command URL, the previous sibling node and the parent node of a item
+    of the command URL, the previous sibling node and the parent node of an item
 */
 struct MigrationItem
 {