Changelog entry for 3.38.10 stable hotfix (#182237)

Now that it's been released, merging the changelog updates to master
from https://github.com/flutter/flutter/pull/182037.

CHANGELOG.md

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f851202..9a47df4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -39,6 +39,10 @@
 
 ## Flutter 3.38 Changes
 
+### [3.38.10](https://github.com/flutter/flutter/releases/tag/3.38.10)
+
+- [flutter/181607](https://github.com/flutter/flutter/pull/181607) When using an ffi plugin on macOS, generated frameworks have the wrong structure.
+
 ### [3.38.9](https://github.com/flutter/flutter/releases/tag/3.38.9)
 
 - [flutter/181568](https://github.com/flutter/flutter/pull/181568) Update Dart to 3.10.8.