Add changelog entry for experimental extensions (#3017)

i14h · web-flow · commit f03c4863c795 · 2021-01-11T17:11:29.000-08:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,3 +1,4 @@
 - Add warning when a developer is using yarn@2 PnP (#2198).
 - Fixes incorrect URLs reported inside emulated HTTPS functions (#1862).
 - Updates underlying timeout handler when proxying through the Hosting emulator.
+- Adds support for installing [experimental extensions](https://github.com/FirebaseExtended/experimental-extensions) (#2830)
