fix: 修复 disposable_emails.py 中的 AttributeError

将 jingrow.in_test 改为 jingrow.flags.in_test，修复注册功能中的 500 错误

jcloude/utils/disposable_emails.py

@@ -11,7 +11,7 @@ def domains() -> list[str]:
 	:return: A list of disposable email domains.
 	"""
 	# In test mode, return a mock domain.
-	if jingrow.in_test:
+	if jingrow.flags.in_test:
 		return [jingrow.mock("domain_name")]
 	uri = "https://raw.githubusercontent.com/disposable/disposable-email-domains/master/domains.txt"
 	domains_response = requests.get(uri)