add announcement header translation file

vendor/built_in_modules/announcement/config/locales/en.yml

@@ -16,4 +16,17 @@ en:
     update_bulletin_success: Announcement was successfully updated
     update_bulletin_category_success: Announcement category was successfully updated
     all_articles: All Articles
-    add_new: New
+    add_new: New
+    widget:
+        index: Index widget
+        bulletins_and_web_links: "Abreast of bulletins and web link"
+    #init don't merge
+    all_articles: "All article"
+    add_new: New
+    categories: Categories
+    approval_setting: "Approval setting"
+    tags: Tag
+    default_widget:
+        bulletin_category_with_title: Category
+        title: Title
+        postdate: "Post date"