Fix changelog categories.

Author: nedtwigg

CHANGES.md

@@ -10,7 +10,9 @@ This document is intended for Spotless developers.
 We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (starting after version `1.27.0`).
 
 ## [Unreleased]
+### Fixed
 * Fix Clang not knowing the filename and changing the format ([#1267](https://github.com/diffplug/spotless/pull/1268))
+
 ## [2.28.0] - 2022-07-28
 ### Added
 * Clang and Black no longer break the build when the binary is unavailable, if they will not be run during that build ([#1257](https://github.com/diffplug/spotless/pull/1257)).

plugin-gradle/CHANGES.md

@@ -3,7 +3,9 @@
 We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (starting after version `3.27.0`).
 
 ## [Unreleased]
+### Fixed
 * Fix Clang not knowing the filename and changing the format ([#1267](https://github.com/diffplug/spotless/pull/1268))
+
 ## [6.9.0] - 2022-07-28
 ### Added
 * Clang and Black no longer break the build when the binary is unavailable, if they will not be run during that build ([#1257](https://github.com/diffplug/spotless/pull/1257)).

plugin-maven/CHANGES.md

@@ -3,7 +3,9 @@
 We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (starting after version `1.27.0`).
 
 ## [Unreleased]
+### Fixed
 * Fix Clang not knowing the filename and changing the format ([#1267](https://github.com/diffplug/spotless/pull/1268))
+
 ## [2.24.0] - 2022-07-28
 ### Added
 * Clang and Black no longer break the build when the binary is unavailable, if they will not be run during that build ([#1257](https://github.com/diffplug/spotless/pull/1257)).