[racket] [website admin] typo in webpage

Sorry to spam this list  with this grammar nazi thing; there
seems to be no address to contact the website's maintainers.
In:

  <http://racket-lang.org/new-name.html>

"to  the degree that  the PLT  community has  defined Scheme
though market share,"

should be:

"to  the degree that  the PLT  community has  defined Scheme
through market share,"
  ^

I think.

HTH
-- 
Marco Maggi