changing build to net9 to see if that fixes it

Author: aishwaryabh

build/BuildSteps.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.IO.Compression;
@@ -349,7 +349,7 @@ public static void TestNewE2EProject()
 
             Environment.SetEnvironmentVariable("DURABLE_FUNCTION_PATH", Settings.DurableFolder);
 
-            Shell.Run("dotnet", $"test {Settings.NewTestProjectFile} -f net8.0 --blame-hang-timeout 10m --logger \"console;verbosity=detailed\"");
+            Shell.Run("dotnet", $"test {Settings.NewTestProjectFile} -f net9.0 --blame-hang-timeout 10m --logger \"console;verbosity=detailed\"");
         }
 
         public static void TestNewE2EProjectDotnetInProc()

test/Cli/Func.E2E.Tests/Azure.Functions.Cli.E2E.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
 	<DisableImplicitNamespaceImports>true</DisableImplicitNamespaceImports>
   </PropertyGroup>