refactor: apply review suggestion

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

Author: headlessNode

lib/node_modules/@stdlib/blas/ext/base/gcusumkbn/docs/types/index.d.ts

@@ -54,7 +54,7 @@ interface Routine {
 	* gcusumkbn( x.length, 0.0, x, 1, y, 1 );
 	* // y => [ 1.0, -1.0, 1.0 ]
 	*/
-	( N: number, sum: number, x: InputArray, strideX: number, y: OutputArray, strideY: number ): OutputArray;
+	<T extends OutputArray>( N: number, sum: number, x: InputArray, strideX: number, y: T, strideY: number ): T;
 
 	/**
 	* Computes the cumulative sum of strided array elements using an improved Kahan–Babuška algorithm and alternative indexing semantics.