Add missing qualifier to SPA templates Program.cs (#34310)

Resolves dotnet/AspNetCore-ManualTests#743

Author: DamianEdwards

src/ProjectTemplates/Web.Spa.ProjectTemplates/content/Angular-CSharp/Program.cs

@@ -23,7 +23,7 @@
 
 // Add services to the container.
 #if (IndividualLocalAuth)
-var connectionString = Configuration.GetConnectionString("DefaultConnection");
+var connectionString = builder.Configuration.GetConnectionString("DefaultConnection");
 builder.Services.AddDbContext<ApplicationDbContext>(options =>
 #if (UseLocalDB)
     options.UseSqlServer(connectionString));

src/ProjectTemplates/Web.Spa.ProjectTemplates/content/React-CSharp/Program.cs

@@ -23,7 +23,7 @@
 
 // Add services to the container.
 #if (IndividualLocalAuth)
-var connectionString = Configuration.GetConnectionString("DefaultConnection");
+var connectionString = builder.Configuration.GetConnectionString("DefaultConnection");
 builder.Services.AddDbContext<ApplicationDbContext>(options =>
 #if (UseLocalDB)
     options.UseSqlServer(connectionString));