Fix changelog category for changelog.

Author: nedtwigg

plugin-maven/CHANGES.md

@@ -3,10 +3,10 @@
 We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (starting after version `1.27.0`).
 
 ## [Unreleased]
+### Added
 * Added `wildcardsLast` option for Java `importOrder` ([#956](https://github.com/diffplug/spotless/pull/956))
 
 ## [2.16.0] - 2021-10-02
-
 ### Added
 * Added support for JBDI bind list params in sql formatter ([#955](https://github.com/diffplug/spotless/pull/955))