docs: update example

Signed-off-by: Athan <kgryte@gmail.com>

Author: kgryte

lib/node_modules/@stdlib/blas/base/ndarray/daxpy/README.md

@@ -54,6 +54,9 @@ var y = new ndarray( 'float64', ybuf, [ 5 ], [ 1 ], 0, 'row-major' );
 var alpha = scalar2ndarray( 5.0, 'float64', 'row-major' );
 var z = daxpy( [ x, y, alpha ] );
 // returns <ndarray>[ 6.0, 11.0, 16.0, 21.0, 26.0 ]
+
+var bool = ( y === z );
+// returns true
 ```
 
 The function has the following parameters: