Update sycl/doc/extensions/experimental/sycl_ext_oneapi_graph.asciidoc

Co-authored-by: Ewan Crawford <[email protected]>

Author: guoyejun

sycl/doc/extensions/experimental/sycl_ext_oneapi_graph.asciidoc

@@ -283,8 +283,8 @@ create an edge, it must be an event returned from a queue
 submission captured by the same graph. Otherwise, a synchronous error will be
 thrown with error code `invalid`. `handler::depends_on()` can be
 used to express edges when a user is working with USM memory rather than SYCL
-buffers. Thirdly, for graph recorded with in-order queue, an edge is added
-automatically between two sequential command groups.
+buffers. Thirdly, for a graph recorded with an in-order queue, an edge is added
+automatically between two sequential command groups submitted to the in-order queue.
 |===
 
 ==== Sub-Graph