Update Dotty version to RC3. Add contributors.

Author: anatoliykmetyuk

docs/blog/_posts/2019-06-11-16th-dotty-milestone-release.md

@@ -1,6 +1,6 @@
 ---
 layout: blog-page
-title: Announcing Dotty 0.16.0-RC1 – the Scala Days 2019 Release
+title: Announcing Dotty 0.16.0-RC3 – the Scala Days 2019 Release
 author: Aggelos Biboudis
 authorImg: /images/aggelos.png
 date: 2019-06-11
@@ -37,7 +37,7 @@ You can learn more about Dotty on our [website](https://dotty.epfl.ch).
 This is our 16th scheduled release according to our
 [6-week release schedule](https://dotty.epfl.ch/docs/contributing/release.html).
 
-# What’s new in the 0.16.0-RC1 technology preview?
+# What’s new in the 0.16.0-RC3 technology preview?
 
 <!-- https://github.com/lampepfl/dotty/pulls?q=is%3Apr+closed%3A%3E2019-05-23+is%3Aclosed+sort%3Acomments-desc -->
 
@@ -158,10 +158,23 @@ If you have questions or any sort of feedback, feel free to send us a message on
 
 Thank you to all the contributors who made this release possible!
 
-According to `git shortlog -sn --no-merges 0.15.0-RC1..0.16.0-RC1` these are:
+According to `git shortlog -sn --no-merges 0.15.0-RC1..0.16.0-RC3` these are:
 
 ```
-
+    88  Martin Odersky
+    51  Anatolii
+    48  Nicolas Stucki
+    26  Guillaume Martres
+    21  Miles Sabin
+    19  Liu Fengyun
+    12  Aleksander Boruch-Gruszecki
+    11  Sébastien Doeraene
+     8  Aggelos Biboudis
+     4  Olivier Blanvillain
+     3  Eugene Yokota
+     1  Dale Wijnand
+     1  Allan Renucci
+     1  Olivier ROLAND
 ```
 
 If you want to get your hands dirty and contribute to Dotty, now is a good time to get involved!