Upgrading to .NET 8.

Author: Psichorex

ShowOrchard.Theme/ShowOrchard.Theme.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Razor">
 
     <PropertyGroup>
-        <TargetFramework>net6.0</TargetFramework>
+        <TargetFramework>net8.0</TargetFramework>
         <AddRazorSupportForMvc>true</AddRazorSupportForMvc>
         <DefaultItemExcludes>$(DefaultItemExcludes);.git*;node_modules\**</DefaultItemExcludes>
     </PropertyGroup>