Update test website to 15.

Author: AndyButland

src/UmbracoExamine-PDF.TestSite/Program.cs

@@ -1,3 +1,7 @@
+using Examine;
+using Umbraco.Cms.Core;
+using UmbracoExamine.PDF;
+
 WebApplicationBuilder builder = WebApplication.CreateBuilder(args);
 
 builder.CreateUmbracoBuilder()
@@ -7,6 +11,11 @@
     .AddComposers()
     .Build();
 
+builder.Services.AddExamineLuceneMultiSearcher("MultiSearcher", [
+    Constants.UmbracoIndexes.ExternalIndexName,
+    PdfIndexConstants.PdfIndexName
+]);
+
 WebApplication app = builder.Build();
 
 await app.BootUmbracoAsync();

src/UmbracoExamine-PDF.TestSite/UmbracoExamine.PDF.Testsite.csproj

@@ -1,14 +1,14 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
     <PropertyGroup>
-        <TargetFramework>net8.0</TargetFramework>
+        <TargetFramework>net9.0</TargetFramework>
         <RootNamespace>UmbracoExamine_PDF.TestSite</RootNamespace>
         <IsPackable>false</IsPackable>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Umbraco.Cms" Version="14.2.0-rc2" />
+        <PackageReference Include="Umbraco.Cms" Version="15.2.1" />
     </ItemGroup>
 
     <ItemGroup>