docs: update note

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

Author: kgryte

lib/node_modules/@stdlib/blas/ext/base/ndarray/gnansum/README.md

@@ -62,7 +62,7 @@ The function has the following parameters:
 
 ## Notes
 
--   If provided an empty real-valued one-dimensional ndarray, the function returns `0.0`.
+-   If provided an empty one-dimensional ndarray, the function returns `0.0`.
 
 </section>