[Webteam] Possibly better URL for Squeak by Example link

[J. Lewis Muir]

Hi.

I noticed at

  http://squeak.org/Documentation/

, the Squeak by Example link is to

  http://www.iam.unibe.ch/%7Escg/SBE/

.  However, the book references

  http://SqueakByExample.org

which seems like a nicer URL to use.

Thanks for all your work on Squeak web site!

Lewis