Add missing barrier exceptions

sycl/doc/extensions/experimental/sycl_ext_oneapi_graph.asciidoc

@@ -1671,6 +1671,19 @@ on.
 This function has the same semantics as `ext_oneapi_barrier(const
 std::vector<event>&)`.
 
+Parameters:
+
+* `waitList` - List of dynamic event dependencies for this barrier.
+
+Exceptions:
+
+* Throws synchronously with error code `invalid` if this function is called from
+a normal SYCL command-group submission.
+
+* Throws synchronously with error code `invalid` if any of the `sycl::event`s
+associated with `waitList` came from the same graph that the graph node
+resulting from this command-group submission is associated with.
+
 |
 [source,c++]
 ----
@@ -1683,7 +1696,7 @@ This function has the same semantics as `depends_on(event)`.
 
 Parameters:
 
-* `depEvents` - Dynamic event dependency.
+* `depEvent` - Dynamic event dependency.
 
 Exceptions: