Update NEWS.txt

NEWS.txt

@@ -23,6 +23,10 @@ Interface changes
    instance, function([x, y], [y]). You can use the kwarg
    ``on_unused_input={'raise', 'warn', 'ignore'}`` to control this.
    (Pascal L.)
+ * tensor.alloc() now raise an error during graph build time
+   when we try to create less dimensions then the number of dimensions
+   the provieded value have. In the past, the error was at run time.
+   (Frederic B.)
 
 New Features
  * debugprint new param ids=["CHAR", "id", "int", ""]