docs: fix README js example

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Author: nakul-krishnakumar

lib/node_modules/@stdlib/blas/ext/base/drrss/README.md

@@ -155,6 +155,7 @@ var z = drrss.ndarray( 4, x, 2, 1, y, 2, 1 );
 
 ```javascript
 var discreteUniform = require( '@stdlib/random/array/discrete-uniform' );
+var drrss = require( '@stdlib/blas/ext/base/drrss' );
 
 var opts = {
     'dtype': 'float64'