docs: enhance README for ssort2hp function to clarify sort order behavior

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Author: 0PrashantYadav0

lib/node_modules/@stdlib/blas/ext/base/ssort2hp/README.md

@@ -254,7 +254,7 @@ stdlib_strided_ssort2hp_ndarray( 4, 1.0f, x, 1, 0, y, 1, 0 );
 The function accepts the following arguments:
 
 -   **N**: `[in] CBLAS_INT` number of indexed elements.
--   **order**: `[in] float` sort order.
+-   **order**: `[in] float` sort order. If `order < 0.0`, the input strided array `x` is sorted in **decreasing** order. If `order > 0.0`, the input strided array `x` is sorted in **increasing** order. If `order == 0.0`, the input strided arrays are left unchanged.
 -   **X**: `[inout] float*` first input array.
 -   **strideX**: `[in] CBLAS_INT` stride length for `X`.
 -   **offsetX**: `[in] CBLAS_INT` starting index for `X`.