docs: apply review suggestion

Signed-off-by: Muhammad Haris <[email protected]>

Author: headlessNode

lib/node_modules/@stdlib/blas/ext/base/sdsnansumpw/README.md

@@ -187,7 +187,7 @@ Computes the sum of single-precision floating-point strided array elements, igno
 const float x[] = { 1.0f, -2.0f, 0.0f/0.0f, 2.0f };
 
 float v = stdlib_strided_sdsnansumpw( 4, x, 1 );
-// returns 1.0
+// returns 1.0f
 ```
 
 The function accepts the following arguments: