Update default concurrent_builds value to 2

database/migrations/2024_01_24_095449_add_concurrent_number_of_builds_per_server.php

@@ -12,7 +12,7 @@
     public function up(): void
     {
         Schema::table('server_settings', function (Blueprint $table) {
-            $table->integer('concurrent_builds')->default(3);
+            $table->integer('concurrent_builds')->default(2);
         });
     }