Update release notes

RELEASES.md

@@ -1,6 +1,6 @@
 # NautilusTrader 1.160.0 Beta
 
-Released on TBD (UTC).
+Released on 28th November 2022 (UTC).
 
 ### Breaking Changes
 - Removed time portion from generated IDs (affects `ClientOrderId` and `PositionOrderId`)
@@ -9,12 +9,15 @@ Released on TBD (UTC).
 
 ### Enhancements
 - Added emulated contingency orders capability to `OrderEmulator`
+- Moved `test_kit` module to main package to support downstream project/package testing
 
 ### Fixes
-- Fixed position event sequencing: generates `PositionOpened` when reopening a closed position
+- Fixed position event sequencing: now generates `PositionOpened` when reopening a closed position
 - Fixed `LIMIT` order fill characteristics when immediately marketable as a taker
 - Fixed `LIMIT` order fill characteristics when passively filled as a maker as quotes move through
 - Fixed canceling OTO contingent orders when still in-flight
+- Fixed `RiskEngine` notional check when selling cash assets (spot currency pairs)
+- Fixed flush on closed file bug for persistence stream writers
 
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