Tweak changelog.

Author: nedtwigg

plugin-gradle/CHANGES.md

@@ -4,7 +4,7 @@ We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (
 
 ## [Unreleased]
 ### Fixed
-* Prevent tool configurations from being resolved outside project ([#1447](https://github.com/diffplug/spotless/pull/1447))
+* Prevent tool configurations from being resolved outside project ([#1447](https://github.com/diffplug/spotless/pull/1447) fixes [#1215](https://github.com/diffplug/spotless/issues/1215))
 
 ## [6.12.1] - 2023-01-02
 ### Fixed