chore: add placeholder text for service name (#2020)

Co-authored-by: lixingwang <lixingwang@yiche.com>
diff --git a/web/src/pages/Service/locales/en-US.ts b/web/src/pages/Service/locales/en-US.ts
index 2c0f2e9..f2ef942 100644
--- a/web/src/pages/Service/locales/en-US.ts
+++ b/web/src/pages/Service/locales/en-US.ts
@@ -20,6 +20,7 @@
   'page.service.steps.stepTitle.preview': 'Preview',
   'page.service.list': 'Service List',
   'page.service.description': 'A service consists of a combination of public plugin configuration and upstream target information in a route. Services are associated with Routes and Upstreams, and a service can correspond to a set of upstream nodes and can be bound by multiple routes.',
+  'page.service.fields.name.required': 'Please enter service name',
   'page.service.create': 'Create Service',
   'page.service.configure': 'Configure Service'
 };