DOC: move the "group" keyword at the right place

It looks like "hard-stop-after", "h1-case-adjust" and "h1-case-adjust-file"
were added before "group", breaking alphabetical ordering.

(cherry picked from commit 11770ce64ba29b91178e61ce6dc11c7713b7469d)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit a54c297c5008a1cce1716e28116272cfddd19d8e)
Signed-off-by: Willy Tarreau <w@1wt.eu>
1 file changed