MAINTAINERS: TRACING: Add Mathieu Desnoyers as Reviewer

In order to make sure I get CC'd on tracing changes for which my input
would be relevant, add my name as reviewer of the TRACING subsystem.

Link: https://lore.kernel.org/linux-trace-kernel/20231115155018.8236-1-mathieu.desnoyers@efficios.com



Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>