Update all package references to version 9.0.0 and target framework to net9.0

Co-authored-by: AndriySvyryd <6539701+AndriySvyryd@users.noreply.github.com>

Author: Copilot

samples/core/Miscellaneous/ConfiguringDbContext/ConfiguringDbContext.csproj

@@ -1,15 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
     <PropertyGroup>
-        <TargetFramework>net8.0</TargetFramework>
+        <TargetFramework>net9.0</TargetFramework>
         <ImplicitUsings>enable</ImplicitUsings>
         <RootNamespace />
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore" Version="8.0.0" />
-        <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="8.0.0" />
-        <PackageReference Include="Microsoft.AspNetCore.Identity.UI" Version="8.0.0" />
+        <PackageReference Include="Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore" Version="9.0.0" />
+        <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="9.0.0" />
+        <PackageReference Include="Microsoft.AspNetCore.Identity.UI" Version="9.0.0" />
         <PackageReference Include="Microsoft.EntityFrameworkCore" Version="9.0.0" />
         <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="9.0.0" />
         <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="9.0.0" />