Fix newlines added to README.

CHANGELOG

@@ -136,6 +136,7 @@ v 8.12.0 (unreleased)
   - Fix Gitlab::Popen.popen thread-safety issue
   - Add specs to removing project (Katarzyna Kobierska Ula Budziszewska)
   - Clean environment variables when running git hooks
+  - Add UX improvements for merge request version diffs
 
 v 8.11.6
   - Fix unnecessary horizontal scroll area in pipeline visualizations. !6005
@@ -143,10 +144,6 @@ v 8.11.6
   - Fix an error where we were unable to create a CommitStatus for running state. !6107
   - Optimize discussion notes resolving and unresolving. !6141
   - Fix GitLab import button. !6167
-  - Frontend for Merge Request diff dropdowns
-
-v 8.11.6 (unreleased)
-  - Fix an error where we were unable to create a CommitStatus for running state
   - Restore SSH Key title auto-population behavior. !6186
   - Fix DB schema to match latest migration. !6256
   - Exclude some pending or inactivated rows in Member scopes.