chore(autonat): changelog entry for dial-back connection closing

Author: imabdulbasit

protocols/autonat/CHANGELOG.md

@@ -1,5 +1,8 @@
 ## 0.16.0
 
+- Close server dial-back connections once the probe completes instead of leaving them open.
+  See [PR 6528](https://github.com/libp2p/rust-libp2p/pull/6528).
+
 - Use `futures-timer` instead of tokio's timer for stream timeouts so the bounded `Delay` works on
   `wasm32`; tokio's timer has no driver in the browser and panics at runtime.
   See [PR 6488](https://github.com/libp2p/rust-libp2p/pull/6488).
@@ -32,19 +35,20 @@
 ## 0.13.0
 
 - Due to the refactor of `Transport` it's no longer required to create a separate transport for
-AutoNAT where port reuse is disabled. This information is now passed by the behaviour.
+  AutoNAT where port reuse is disabled. This information is now passed by the behaviour.
   See [PR 4568](https://github.com/libp2p/rust-libp2p/pull/4568).
 - Introduce the new AutoNATv2 protocol.
   It's split into a client and a server part, represented in their respective modules
   Features:
     - The server now always dials back over a newly allocated port.
       This more accurately reflects the reachability state for other peers and avoids accidental hole punching.
     - The server can now test addresses different from the observed address (i.e., the connection to the server was made through a `p2p-circuit`). To mitigate against DDoS attacks, the client has to send more data to the server than the dial-back costs.
-  See [PR 5526](https://github.com/libp2p/rust-libp2p/pull/5526).
+      See [PR 5526](https://github.com/libp2p/rust-libp2p/pull/5526).
 
 <!-- Update to libp2p-swarm v0.45.0 -->
 
 ## 0.12.1
+
 - Use `web-time` instead of `instant`.
   See [PR 5347](https://github.com/libp2p/rust-libp2p/pull/5347).
 
@@ -92,7 +96,6 @@ AutoNAT where port reuse is disabled. This information is now passed by the beha
 
 [PR 3351]: https://github.com/libp2p/rust-libp2p/pull/3351
 
-
 ## 0.9.0
 
 - Update to `libp2p-core` `v0.38.0`.
@@ -177,7 +180,7 @@ AutoNAT where port reuse is disabled. This information is now passed by the beha
 
 - Update to `libp2p-request-response` `v0.16.0`.
 
-- Merge NetworkBehaviour's inject_\* paired methods (see PR 2445).
+- Merge NetworkBehaviour's inject\_\* paired methods (see PR 2445).
 
 [PR 2445]: https://github.com/libp2p/rust-libp2p/pull/2445