Use array literal [] for empty CORS origins default

Replaces Array.Empty<string>() with the C# array literal [] when defaulting the CORS allowed origins array. This is a syntactic improvement with no change in behavior.

DbFirst.API/Program.cs

@@ -30,7 +30,7 @@ builder.Services.AddCors(options =>
         }
         else
         {
-            var origins = builder.Configuration.GetSection("Cors:AllowedOrigins").Get<string[]>() ?? Array.Empty<string>();
+            var origins = builder.Configuration.GetSection("Cors:AllowedOrigins").Get<string[]>() ?? [];
             if (origins.Length > 0)
             {
                 policy.WithOrigins(origins)