chore: update version to 0.0.4 in project file

Author: fengb3

RAGFlowSharp/RAGFlowSharp.csproj

@@ -4,7 +4,7 @@
         <TargetFramework>netstandard2.1</TargetFramework>
         <Nullable>enable</Nullable>
 
-        <Version>0.0.3</Version>
+        <Version>0.0.4</Version>
         <Authors>fengb3</Authors>
 
         <Description>C# SDK for RAGFlow</Description>