Add slightly more background on the difference between main and master

Towards #1904

Author: raboof

book/02-git-basics/sections/recording-changes.asc

@@ -38,11 +38,9 @@ For now, that branch is always `master`, which is the default; you won't worry a
 
 [NOTE]
 ====
-GitHub changed the default branch name from `master` to `main` in mid-2020, and other Git hosts followed suit.
-So you may find that the default branch name in some newly created repositories is `main` and not `master`.
-In addition, the default branch name can be changed (as you have seen in <<ch01-getting-started#_new_default_branch>>), so you may see a different name for the default branch.
-
-However, Git itself still uses `master` as the default, so we will use it throughout the book.
+Mid-2020, the Git project [started the discussion](https://lore.kernel.org/git/CAOAHyQwyXC1Z3v7BZAC+Bq6JBaM7FvBenA-1fcqeDV==apdWDg@mail.gmail.com/) on moving away from `master` as the default branch name. Git hosts such as GitHub changed the default branch name from `master` to `main` and other Git hosts followed suit. Starting from version 3.0, git itself also defaults to `main`.
+This means you may find that the default branch name in some older repositories is `master` and not `main`.
+As the default branch name can be changed (as you have seen in <<ch01-getting-started#_new_default_branch>>), you may see a different name for the default branch.
 ====
 
 Let's say you add a new file to your project, a simple `README` file.