chore: fix changelog headings

Author: SimenB

CHANGELOG.md

@@ -8,10 +8,10 @@
 
 ### Performance
 
-### Features
-
 ## 27.0.0
 
+### Features
+
 - `[babel-jest]` Add async transformation ([#11192](https://github.com/facebook/jest/pull/11192))
 - `[jest-changed-files]` Use '--' to separate paths from revisions ([#11160](https://github.com/facebook/jest/pull/11160))
 - `[jest-circus]` [**BREAKING**] Fail tests when multiple `done()` calls are made ([#10624](https://github.com/facebook/jest/pull/10624))