Update information about GitHub's private repositories (#1346)

Update information about GitHub's private repositories

Author: ben

book/06-github/sections/1-setting-up-account.asc

@@ -13,8 +13,11 @@ Go ahead and do this; it's pretty important (as we'll see later).
 
 [NOTE]
 ====
-GitHub provides all of its functionality with free accounts, with the limitation that all of your projects are fully public (everyone has read access).
-GitHub's paid plans also include the option of creating private projects, but we won't be covering those in this book.
+GitHub provides almost all of its functionality with free accounts, except some advanced features.
+Additionally, private repositories are limited to 3 collaborators.
+
+GitHub's paid plans include advanced tools and features as well as increased limits for free services, but we won't be covering those in this book.
+To get more information about available plans and their comparison, visit https://github.com/pricing[].
 ====
 
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