update instructions

Author: SethTisue

blog/README.md

@@ -4,31 +4,23 @@ Adding a blog entry to scala-lang is simple – we use Jekyll (see the README in
 the root of this repository for Jekyll setup instructions in case you don't
 have Jekyll installed.)
 
-## What's the difference between a blog entry and a news item?
-
-A blog article is a larger instructional/opinion/informational original piece.
-An example is the blog article that we published about running our first
-Coursera course in December 2012,
-_[Functional Programming Principles in Scala: Impressions and Statistics](https://docs.scala-lang.org/news/functional-programming-principles-in-scala-impressions-and-statistics.html)_.
-News items
-or announcements on the other hand are just that – short news flashes
-announcing something, whether it be a new release, a new project, a new
-course, or anything in between.
-
-If you realize you should be writing a news item instead of a blog article,
-see the README in the `/news` directory of this repository for instructions on
-how to add a news item to our feed (both blog articles and news items show up
-in the same place on the front page of scala-lang.org)
+## What kinds of entries exist?
+
+There are three:
+
+* `category: release` for Scala release announcements
+* `category: highlights` for issues of the Scala Highlights newsletter
+* `category: blog` for everything else
 
 ## Workflow
 
-- Create a markdown file in the `/blog/_posts` directory of this repository named according to the convention: `YYYY-MM-DD-name-for-your-article.md`
+- Create a markdown file in the `/blog/_posts` directory of this repository (or the `/_posts/` directory for release announcements) named according to the convention: `YYYY-MM-DD-name-for-your-article.md`
 - Add some YAML frontmatter. For example:
 
 ```
     ---
     layout: blog-detail
-    post-type: blog
+    category: blog
     by: Joe Schmoe
     title: My Uber Cool Scala Article
     ---