docs: fix comment

Signed-off-by: Athan <[email protected]>

Author: kgryte

lib/node_modules/@stdlib/stats/base/nanvarianceyc/lib/nanvarianceyc.js

@@ -18,7 +18,7 @@
 
 'use strict';
 
-// Modules
+// MODULES //
 
 var stride2offset = require( '@stdlib/strided/base/stride2offset' );
 var ndarray = require( './ndarray.js' );