Add v4.8.1 to CHANGELOG

(cherry picked from commit 9c226d3)

Author: kategengler

CHANGELOG.md

@@ -13,6 +13,10 @@
 - [#20238](https://github.com/emberjs/ember.js/pull/20238) [BUGFIX] Update Node.js versions to match support policy
 - [#20244](https://github.com/emberjs/ember.js/pull/20244) [BUGFIX] Expose getComponentTemplate type
 
+### v4.8.1 (November 2, 2022)
+
+- [CVE pending](https://emberjs.com/blog/ember-4-8-1-released) Fix a prototype pollution vulnerability in `set` and `setProperties`
+
 ### v4.4.4 (November 2, 2022)
 
 - [CVE pending](https://emberjs.com/blog/ember-4-8-1-released) Fix a prototype pollution vulnerability in `set` and `setProperties