moving aspnet to preview4 (#2808)

Author: brettsam

extensions/Worker.Extensions.Http.AspNetCore/src/Worker.Extensions.Http.AspNetCore.csproj

@@ -7,7 +7,7 @@
 
     <!--Version information-->
     <VersionPrefix>2.0.0</VersionPrefix>
-    <VersionSuffix>-preview3</VersionSuffix>
+    <VersionSuffix>-preview4</VersionSuffix>
     <TargetFramework>net6.0</TargetFramework>
   </PropertyGroup>
 
@@ -24,7 +24,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Azure.Functions.Worker" Version="2.0.0-preview3" />
+    <PackageReference Include="Microsoft.Azure.Functions.Worker" Version="2.0.0-preview4" />
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="8.0.0" />
   </ItemGroup>