docs: reporting-issues: move 'outdated, need help' note to proper place

Move the 'this section is a placeholder for now and needs help by
someone with domain knowledge' note one section upwards to the place
where it belongs: the 'Decode failure messages' section.

Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info>
Link: https://lore.kernel.org/r/d3894ba4a302beed661304cbcdc062c6dcfe3e58.1607489877.git.linux@leemhuis.info


Signed-off-by: Jonathan Corbet <corbet@lwn.net>