fix misspelling

api/cl_khr_command_buffer.asciidoc

@@ -142,7 +142,7 @@ support their intended use cases.
 The command recording entry-points allow a `properties` parameter of
 new type {cl_command_properties_khr_TYPE} to be passed. No properties are
 defined in {cl_khr_command_buffer_EXT}, but the parameter enables layered
-extensions to define characterisitcs of the individual commands.
+extensions to define characteristics of the individual commands.
 
 For example, {cl_khr_command_buffer_mutable_dispatch_EXT} defines properties
 that can be set when appending a kernel command with {clCommandNDRangeKernelKHR}.