Merge pull request #356 from notion-dotnet/4.1.0

Update version prefix to 4.1.0

Author: KoditkarVedant

Src/Notion.Client/Notion.Client.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <VersionPrefix>4.0.0-preview</VersionPrefix>
+    <VersionPrefix>4.1.0-preview</VersionPrefix>
     <TargetFramework>netstandard2.0</TargetFramework>
     <LangVersion>9.0</LangVersion>