editorial: in 7.1 update the link to role=presentation

[pkra]

The link <a href="#presentation">presentation (role)</a> here

aria/index.html

Line 16139 in 9c3cfe4

text content are generally included. These exceptions and conditions are documented in the <a href="#presentation">presentation (role)</a> section.

should point to role=none nowadays.

But I'm also wondering if it should perhaps link to 9.3 instead.