docs: fix examples require path for blas/ext/base/gnansumpw

PR-URL: #4642
Reviewed-by: Athan Reines <kgryte@gmail.com>

Author: headlessNode

lib/node_modules/@stdlib/blas/ext/base/gnansumpw/examples/index.js

@@ -21,7 +21,7 @@
 var discreteUniform = require( '@stdlib/random/base/discrete-uniform' );
 var bernoulli = require( '@stdlib/random/base/bernoulli' );
 var filledarrayBy = require( '@stdlib/array/filled-by' );
-var gnansumpw = require( '@stdlib/blas/ext/base/gnansumpw' );
+var gnansumpw = require( './../lib' );
 
 function rand() {
 	if ( bernoulli( 0.7 ) > 0 ) {