Merge pull request #826 from etcd-io/change_1.3.11_release_date

Update release date of 1.3.11

Author: ahrtr

CHANGELOG/CHANGELOG-1.3.md

@@ -2,7 +2,7 @@ Note that we start to track changes starting from v1.3.7.
 
 <hr>
 
-## v1.3.11(TBD)
+## v1.3.11(2024-08-21)
 
 ### BoltDB
 - Fix [the `freelist.allocs` isn't rollbacked when a tx is rollbacked](https://github.com/etcd-io/bbolt/pull/823).