docs: update desc

Signed-off-by: Athan <kgryte@gmail.com>

Author: kgryte

lib/node_modules/@stdlib/stats/base/ndarray/nanmeanpn/README.md

@@ -53,7 +53,7 @@ var nanmeanpn = require( '@stdlib/stats/base/ndarray/nanmeanpn' );
 
 #### nanmeanpn( arrays )
 
-Computes the [arithmetic mean][arithmetic-mean] of a one-dimensional ndarray, ignoring `NaN` values.
+Computes the [arithmetic mean][arithmetic-mean] of a one-dimensional ndarray, ignoring `NaN` values and using a two-pass error correction algorithm.
 
 ```javascript
 var ndarray = require( '@stdlib/ndarray/base/ctor' );