Add 0.19.0 changelog entry

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: runningcode

docs/changelog.md

@@ -1,8 +1,11 @@
 # Changelog
 
 ## Unreleased
+
+## 0.19.0
 * Minimum required JVM version is now 17.
 * Minimum supported Gradle version is now 7.3.
+* Fix support for Gradle 9.0.0. [PR](https://github.com/runningcode/fladle/pull/452) Thanks [kevinguitar](https://github.com/kevinguitar)
 
 ## 0.18.0
 * Use non-deprecated device models and versions in default config. [PR](https://github.com/runningcode/fladle/pull/446) Thanks [Kaibolay](https://github.com/kaibolay)