chore: prepare v1.18.1 release

Co-authored-by: YunchuWang <[email protected]>

Author: Copilot

CHANGELOG.md

@@ -1,4 +1,7 @@
-# Changelog
+# Changelog
+
+## v1.18.1
+- Support dedup status when starting orchestration by wangbill ([#542](https://github.com/microsoft/durabletask-dotnet/pull/542))
 
 ## v1.18.0
 - Add taskentity support to durabletasksourcegenerator by Copilot ([#517](https://github.com/microsoft/durabletask-dotnet/pull/517))

eng/targets/Release.props

@@ -17,7 +17,7 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <VersionPrefix>1.18.0</VersionPrefix>
+    <VersionPrefix>1.18.1</VersionPrefix>
     <VersionSuffix></VersionSuffix>
   </PropertyGroup>