[release] Add 2.16.2 release notes

Change-Id: I099b090401af4280f13b42eea21fc0ca13379495
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/238044
Reviewed-by: Michael Thomsen <mit@google.com>
diff --git a/CHANGELOG.md b/CHANGELOG.md
index fbba72b..c722e0e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## 2.16.2 - 2022-03-24
+
+This is a patch release that fixes a dart2js crash when building some Flutter
+web apps (issue [#47916][]).
+
+[#47916]: https://github.com/dart-lang/sdk/issues/47916
+
 ## 2.16.1 - 2022-02-09
 
 This is a patch release that fixes an AOT precompiler crash when building some