fix: add forgotten changes

Endpoint/Controllers/Configuration/SetupController.cs

@@ -90,10 +90,11 @@ public class SetupController(
     {
         try
         {
-            using var connection = new TConnection();
-            connection.ConnectionString = connectionString;
-            connection.Open();
-            connection.Close();
+            using (var connection = new TConnection())
+            {
+                connection.ConnectionString = connectionString;
+                connection.Open();
+                connection.Close();
 
                 if (connection is SqliteConnection)
                     SqliteConnection.ClearAllPools();