Update release notes

yuting-fan · Yangtao-Hua · commit 31f76d0bdd0d · 2022-05-27T12:52:49.000-07:00
cr: https://code.amazon.com/reviews/CR-70149495
diff --git a/RELEASENOTES.md b/RELEASENOTES.md
@@ -1,5 +1,9 @@
 Latest
 ================
+- Fix port session premature close when local server is not connected before timeout
+
+1.2.323.0
+================
 - Disable smux keep alive to use idle session timeout feature
 
 1.2.312.0
