docs: update copy

Signed-off-by: Athan <kgryte@gmail.com>

Author: kgryte

lib/node_modules/@stdlib/ndarray/base/tile/README.md

@@ -54,6 +54,11 @@ var y = tile( x, [ 2, 2 ] );
 // returns <ndarray>[ [ 1, 2, 1, 2 ], [ 3, 4, 3, 4 ], [ 1, 2, 1, 2 ], [ 3, 4, 3, 4 ] ]
 ```
 
+The function accepts the following arguments:
+
+-   **x**: input [ndarray][@stdlib/ndarray/base/ctor].
+-   **reps**: list specifying the number of times to repeat elements of an input [ndarray][@stdlib/ndarray/base/ctor] along each dimension.
+
 </section>
 
 <!-- /.usage -->