fix：SerializedAdditionalRawData MissingMethodException

Author: geffzhang

Directory.Packages.props

@@ -53,7 +53,7 @@
     <PackageVersion Include="Whisper.net.Runtime" Version="1.8.1" />
     <PackageVersion Include="NCrontab" Version="3.3.3" />
     <PackageVersion Include="Azure.AI.OpenAI" Version="2.5.0-beta.1" />
-    <PackageVersion Include="OpenAI" Version="2.6.0" />
+    <PackageVersion Include="OpenAI" Version="2.5.0" />
     <PackageVersion Include="MailKit" Version="4.14.1" />
     <PackageVersion Include="Microsoft.Data.Sqlite" Version="10.0.0" />
     <PackageVersion Include="MySql.Data" Version="9.5.0" />