add reference to sample contents.lr

service/blog.md

@@ -44,7 +44,7 @@ title: Blog
 #### 10. In the text editor which appears, draft the new blog post
 
   * Required fields are `title`, `author`, `pub_date`, `summary` and `body` and
-    `categories`
+    `categories` ([sample contents.lr](#sample-contentslr))
 
   * Markdown is accepted in `summary` and `body` fields
 
@@ -107,7 +107,9 @@ title: Blog
 [Pipelines]: https://gitlab.torproject.org/tpo/web/blog/-/pipelines
 [Environments]: https://gitlab.torproject.org/tpo/web/blog/-/environments
 
-### Sample contents.lr
+# Reference
+
+## Sample contents.lr
 
 ```
 title: New Tor Blog
@@ -116,6 +118,8 @@ author: lavamind
 ---
 pub_date: 2021-08-17
 ---
+categories: announcements
+---
 summary:
 The new Tor Blog is here!
 ---
@@ -125,8 +129,6 @@ The new Tor Blog is here!
 The new Tor Blog now runs on top of the Lektor static site generator.
 ```
 
-# Reference
-
 ## List of categories
 
 In the process of migrating the blog from Drupal to Lektor, the number of tags