update 3.4 change log for 3.4.19
@@ -10,9 +10,11 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.4.18...v3.4.19) an
### etcd server
- Fix [exclude the same alarm type activated by multiple peers](https://github.com/etcd-io/etcd/pull/13475).
+- Fix [Defrag unsets backend options](https://github.com/etcd-io/etcd/pull/13713).
+- Fix [lease leak issue due to tokenProvider isn't enabled when restoring auth store from a snapshot](https://github.com/etcd-io/etcd/pull/13206).
### Package `clientv3`
-- Fix [a bug of not refreshing expired tokens](https://github.com/etcd-io/etcd/pull/13308).
+- Fix [a bug of not refreshing expired tokens](https://github.com/etcd-io/etcd/pull/13999).
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