fix AbpAspNetCoreDemo.PlugIn.dll path in unit test

Author: ismcagdas

test/aspnet-core-demo/AbpAspNetCoreDemo/Startup.cs

@@ -92,10 +92,10 @@ public IServiceProvider ConfigureServices(IServiceCollection services)
                 string plugDllInPath = "";
 #if DEBUG
                 plugDllInPath = Path.Combine(_env.ContentRootPath,
-                    @"..\AbpAspNetCoreDemo.PlugIn\bin\Debug\net7.0\AbpAspNetCoreDemo.PlugIn.dll");
+                    @"..\AbpAspNetCoreDemo.PlugIn\bin\Debug\net8.0\AbpAspNetCoreDemo.PlugIn.dll");
 #else
                 plugDllInPath = Path.Combine(_env.ContentRootPath,
-                    @"..\AbpAspNetCoreDemo.PlugIn\bin\Release\net7.0\AbpAspNetCoreDemo.PlugIn.dll");
+                    @"..\AbpAspNetCoreDemo.PlugIn\bin\Release\net8.0\AbpAspNetCoreDemo.PlugIn.dll");
 #endif
                 if (!File.Exists(plugDllInPath))
                 {