CHANGELOG: update for v1.3.9

- [bucket: allow to allocate key on stack in Put()](etcd-io#550)
- [bucket.Put: copy key before seek](etcd-io#637)
- [copy key before comparing during CreateBucket or CreateBucketIfNotExists](etcd-io#641)

Signed-off-by: Wei Fu <fuweid89@gmail.com>

CHANGELOG/CHANGELOG-1.3.md

@@ -1,5 +1,10 @@
 Note that we start to track changes starting from v1.3.7.
 
+## v1.3.9(TBD)
+
+### BoltDB
+- [Clone the key before operating data in bucket against the key](https://github.com/etcd-io/bbolt/pull/639)
+
 <hr>
 
 ## v1.3.8(2023-10-26)