new url for the gcc-12 m2 repro (now on gcc.gnu.org)

[Gaius Mulley]

Hello,

I thought I'd mention that I've updated the webpages to include the new
url of the git repro for the gcc-12 version of gm2, which is now:

  git clone git://gcc.gnu.org/git/gcc.git gcc-git
  cd gcc-git
  git checkout devel/modula-2

(see http://nongnu.org/gm2/download.html)


regards,
Gaius