Update the Toaster documentation links to the new
Yocto Project URLs.
[YOCTO #14092]
(Bitbake rev: 9345d257ced432adc2d16af20ace58cc7c086aab)
Signed-off-by: David Reyna <David.Reyna@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>