docs: fix grammar in comments

Author: kgryte

lib/node_modules/@stdlib/ndarray/base/to-array/README.md

@@ -127,7 +127,7 @@ var offset = strides2offset( shape, strides );
 console.log( '' );
 console.log( 'Dims: %s', shape.join( 'x' ) );
 
-// Random flip strides and convert an ndarray to a nested array...
+// Randomly flip strides and convert an ndarray to a nested array...
 var arr;
 var j;
 for ( i = 0; i < 20; i++ ) {

lib/node_modules/@stdlib/ndarray/base/to-array/examples/index.js

@@ -43,7 +43,7 @@ var offset = strides2offset( shape, strides );
 console.log( '' );
 console.log( 'Dims: %s', shape.join( 'x' ) );
 
-// Random flip strides and convert an ndarray to a nested array...
+// Randomly flip strides and convert an ndarray to a nested array...
 var arr;
 var j;
 for ( i = 0; i < 20; i++ ) {