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

Co-authored-by: Ewan Crawford <ewan@codeplay.com>

sycl/doc/extensions/experimental/sycl_ext_oneapi_graph.asciidoc

@@ -1345,7 +1345,7 @@ void update(node& node);
 | Updates an executable graph node that corresponds to `node`. `node` must be a
 kernel execution node. The command-group function of the node will be updated,
 inside the executable graph, to reflect the current values in `node`. This
-includes the kernel function, the kernel nd-range and the kernel parameters".
+includes the kernel function, the kernel nd-range and the kernel parameters.
 
 Updating these values will not change the structure of the graph.