update OpenCL change log from v3.0.11 (#837)

* start to update the change log

* update the change log

* update change log

api/appendix_e.asciidoc

@@ -540,3 +540,14 @@ Changes from *v3.0.10*:
   * Added new extensions:
       ** `cl_khr_subgroup_rotate`
       ** `cl_khr_work_group_uniform_arithmetic`
+
+Changes from *v3.0.11*:
+
+  * Added a definition for a valid object and requirements for testing for valid objects.
+  * Added a maximum limit for the number of arguments supported by a kernel.
+  * Clarified requirements for comparability and uniqueness of object handles.
+  * Clarified behavior for invalid device-side enqueue `clk_event_t` handles.
+  * Clarified `cl_khr_command_buffer` interactions with other extensions.
+  * Specified error behavior when a command buffer is finalized multiple times.
+  * Added new extension:
+      ** `cl_khr_command_buffer_mutable_dispatch` (provisional)