Updating README

README.md

@@ -4,9 +4,13 @@ This repo contains all the downloadable materials and projects associated with t
 
 Each edition has its own branch, named `editions/[EDITION]`. The default branch for this repo is for the most recent edition.
 
+## Forum
+
+We’ve set up an official forum for the book at [https://forums.raywenderlich.com/c/books/git-apprentice](https://forums.raywenderlich.com/c/books/git-apprentice). This is a great place to ask questions about the book or to submit any errors you may find.
+
 ## Release History
 
 | Branch                                                                            | Edition | Release Date |
 | --------------------------------------------------------------------------------- |:-------:|:------------:|
 | [editions/1.0](https://github.com/raywenderlich/gita-materials/tree/editions/1.0) | 1.0     | 2020-10-01   |
-| [editions/2.0](https://github.com/raywenderlich/gita-materials/tree/editions/2.0) | 2.0     | YYYY-MM-DD   |
+| [editions/2.0](https://github.com/raywenderlich/gita-materials/tree/editions/2.0) | 2.0     | 2021-11-12   |