Update CHANGELOG for 8.1.3

[ci skip]

CHANGELOG

@@ -2,25 +2,10 @@ Please view this file on the master branch, on stable branches it's out of date.
 
 v 8.1.3
   - Force update refs/merge-requests/X/head upon a push to the source branch of a merge request (Stan Hu)
-
-v 8.1.2
-v 8.1.3
   - Spread out runner contacted_at updates
-v 8.2.0 (unreleased)
-  - Improved performance of replacing references in comments
-  - Show last project commit to default branch on project home page
-  - Highlight comment based on anchor in URL
-  - Adds ability to remove the forked relationship from project settings screen. (Han Loong Liauw)
-  - Improved performance of sorting milestone issues
-  - Allow users to select the Files view as default project view (Cristian Bica)
-  - Show "Empty Repository Page" for repository without branches (Artem V. Navrotskiy)
-  - Fix: Inability to reply to code comments in the MR view, if the MR comes from a fork
-  - Use git follow flag for commits page when retrieve history for file or directory
-  - Show merge request CI status on merge requests index page
-  - Fix: 500 error returned if destroy request without HTTP referer (Kazuki Shimizu)
-  - Use issue editor as cross reference comment author when issue is edited with a new mention.
+  - Use issue editor as cross reference comment author when issue is edited with a new mention
 
-v 8.1.1
+v 8.1.2
   - Fix cloning Wiki repositories via HTTP (Stan Hu)
   - Add migration to remove satellites directory
   - Fix specific runners visibility