style: add missing whitespace

PR-URL: #16531
Reviewed-by: Athan Reines <kgryte@gmail.com>

Author: Planeshifter

lib/node_modules/@stdlib/math/base/tools/hermitepoly/README.md

@@ -108,7 +108,7 @@ var v = polyval( 0.5 );
 <!-- eslint no-undef: "error" -->
 
 ```javascript
-var randu = require( '@stdlib/random/base/randu');
+var randu = require( '@stdlib/random/base/randu' );
 var hermitepoly = require( '@stdlib/math/base/tools/hermitepoly' );
 
 var x;