Update example output in README.md

Signed-off-by: Rohit R Bhat <bhatrr2021@gmail.com>

Author: JavaTypedScript

lib/node_modules/@stdlib/ndarray/any-by/README.md

@@ -107,7 +107,7 @@ var opts = {
 
 // Perform reduction:
 var out = anyBy( x, opts, isPositive );
-// returns <ndarray>[ [ [ [ true ] ] ] ]
+// returns <ndarray>[ [ true ] ]
 ```
 
 To set the function execution context, provide a `thisArg`.