test: add buildsConcurrency setting to server configuration tests

- Introduced a new `buildsConcurrency` property in the server configuration tests to ensure proper handling of concurrent builds in deployment scenarios.

apps/dokploy/__test__/traefik/server/update-server-config.test.ts

@@ -25,6 +25,7 @@ const baseSettings: WebServerSettings = {
 	letsEncryptEmail: null,
 	sshPrivateKey: null,
 	enableDockerCleanup: false,
+	buildsConcurrency: 1,
 	logCleanupCron: null,
 	metricsConfig: {
 		containers: {