docs: fix .dtype in examples.js

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---

Author: Sachinn-64

lib/node_modules/@stdlib/stats/base/ndarray/dnanmskrange/examples/index.js

@@ -27,13 +27,13 @@ var dnanmskrange = require( './../lib' );
 var xbuf = uniform( 10, -50.0, 50.0, {
 	'dtype': 'float64'
 });
-var x = new ndarray( xbuf.dtype, xbuf, [ xbuf.length ], [ 1 ], 0, 'row-major' );
+var x = new ndarray( 'float64', xbuf, [ xbuf.length ], [ 1 ], 0, 'row-major' );
 console.log( ndarray2array( x ) );
 
 var maskbuf = bernoulli( xbuf.length, 0.2, {
 	'dtype': 'uint8'
 });
-var mask = new ndarray( maskbuf.dtype, maskbuf, [ maskbuf.length ], [ 1 ], 0, 'row-major' );
+var mask = new ndarray( 'uint8', maskbuf, [ maskbuf.length ], [ 1 ], 0, 'row-major' );
 console.log( ndarray2array( mask ) );
 
 var v = dnanmskrange( [ x, mask ] );