Documentation: trace: histogram: Fix histogram trigger subsection number order

Documentation: trace: histogram: Fix histogram trigger subsection number order

Section numbering in subsections of "Histogram Trigger Command" sections
is inconsistent in order. In particular, "'hist' trigger examples" is
erroneously numbered as 6.2, which is a leftover from  b8df4a3634e08a
("tracing: Move hist trigger Documentation to histogram.txt").

Fix the order.

Reviewed-by: Tom Zanussi <zanussi@kernel.org>
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20250916054202.582074-3-bagasdotme@gmail.com>