docs: fix example

Author: kgryte

lib/node_modules/@stdlib/blas/base/cscal/lib/index.js

@@ -56,7 +56,7 @@
 *
 * cscal.ndarray( 3, ca cx, 1, 0 );
 *
-* var z = y.get( 0 );
+* var z = cx.get( 0 );
 * // returns <Complex64>
 *
 * var re = realf( z );