docs: improve doctests for ndarray instances in blas namespace

Propagates fix from 97d6f49 ("docs: improve doctests for ndarray instances in `blas/sdot`") to the `sdot` @example entry in `blas/docs/types/index.d.ts`, collapsing the `// returns <ndarray>` + `var v = z.get();` two-step pattern into the inline `<ndarray>[ -5.0 ]` form used by the adjacent `ddot` entry.

Author: claude

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

@@ -188,10 +188,7 @@ interface Namespace {
 	* var y = array( new Float32Array( [ 2.0, 6.0, -1.0, -4.0, 8.0 ] ) );
 	*
 	* var z = ns.sdot( x, y );
-	* // returns <ndarray>
-	*
-	* var v = z.get();
-	* // returns -5.0
+	* // returns <ndarray>[ -5.0 ]
 	*/
 	sdot: typeof sdot;