changed advice on use of h1 headings in document outline.

Hi all,

as the result of a bug[1] the advice to use h1 in sections has been removed
[2]


old text:

"Sections may contain headings of any
rank<http://www.w3.org/TR/html51/sections.html#rank>,
but authors are strongly encouraged to either use only
h1<http://www.w3.org/TR/html51/sections.html#the-h1,-h2,-h3,-h4,-h5,-and-h6-elements>elements,
or to use elements of the appropriate
rank <http://www.w3.org/TR/html51/sections.html#rank> for the section's
nesting level."

new text:

"Sections may contain headings of any
rank<http://www.w3.org/html/wg/drafts/html/master/sections.html#rank>,
but authors are strongly encouraged to use elements of the appropriate
rank<http://www.w3.org/html/wg/drafts/html/master/sections.html#rank>for
the section's nesting level."

please review the change [3] at you leisure, feedback welcome.


[1] https://www.w3.org/Bugs/Public/show_bug.cgi?id=19741
[2]
https://github.com/w3c/html/commit/556da56c44a2be0cabb9eccbe51fe583fcdf4332
[3]
http://www.w3.org/html/wg/drafts/html/master/sections.html#headings-and-sections
-- 
with regards

Steve Faulkner
Technical Director - TPG