Add release notes.

samuel-williams-shopify · samuel-williams-shopify · commit 6566df383d13 · 2025-09-02T00:13:55.000+12:00
diff --git a/releases.md b/releases.md
@@ -3,6 +3,7 @@
 ## Unreleased
 
   - Thread-safe `Async::Condition` and `Async::Notification`, implemented using `Thread::Queue`.
+  - Thread-safe `Async::Queue` and `Async::LimitedQueue`, implemented using `Thread::Queue` and `Thread::LimitedQueue` respectively.
 
 ### Introduce `Async::PriorityQueue`.
 
