CHANGELOG.md: Add entry for PR #401

Signed-off-by: Andrew Gunnerson <[email protected]>

CHANGELOG.md

@@ -13,6 +13,8 @@
 * When using `--ignore-magisk-warnings`, assume that unsupported Magisk versions newer than the latest supported version are capable of all features ([Issue #393], [PR #395])
 * Rebase our fork of bzip2-rs on top of v0.5.0 and switch to the Rust backend ([PR #397])
 * Minor code cleanup for custom integer range type ([PR #398])
+* Improve errors to make them less ambiguous about what went wrong ([PR #401])
+* Fix bug where a vendor v4 boot image that was truncated in the bootconfig padding section would be accepted as valid ([PR #401])
 
 ### Version 3.10.0
 
@@ -422,3 +424,4 @@ Behind-the-scenes changes:
 [PR #395]: https://github.com/chenxiaolong/avbroot/pull/395
 [PR #397]: https://github.com/chenxiaolong/avbroot/pull/397
 [PR #398]: https://github.com/chenxiaolong/avbroot/pull/398
+[PR #401]: https://github.com/chenxiaolong/avbroot/pull/401