Add v6.1.0-beta.1 to CHANGELOG for ember-source

(cherry picked from commit afc114f)

Author: kategengler

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Ember Changelog
 
+## v6.1.0-beta.1 (November 11, 2024)
+
+- [#20782](https://github.com/emberjs/ember.js/pull/20782) [BUGFIX] Fixes Ember keyword shadowing: keywords should always be superseded by in-scope lexical variables
+- [#20787](https://github.com/emberjs/ember.js/pull/20787) Publish ember-source as v2 addon
+
 ## v6.0.0 (November 11, 2024)
 
 - [BREAKING] Features and APIs that were deprecated until v6.0 will now throw exceptions and the related code will be removed imminently. For a list of deprecations, see the [Deprecation Guide](https://deprecations.emberjs.com/v5.x).