docs: changelog 4.0.20

Author: soyuka

CHANGELOG.md

@@ -1,5 +1,15 @@
 # Changelog
 
+## v4.0.20
+
+### Bug fixes
+
+* [284937039](https://github.com/api-platform/core/commit/284937039c61d4516687c648f4a7581ec1686f3d) fix(doctrine): mapping ArrayAccess deprecation (#6982)
+* [a434173b8](https://github.com/api-platform/core/commit/a434173b82f735041a79cb5f469ee0e731ca5956) fix(doctrine): Add a proper exception when a doctrine manager could not be found for a resource class (#6995)
+
+
+### Features
+
 ## v4.0.19
 
 ### Bug fixes
@@ -3016,4 +3026,4 @@ Please read #2825 if you have issues with the behavior of Readable/Writable Link
 ## 1.0.0 beta 2
 
 * Preserve indexes when normalizing and denormalizing associative arrays
-* Allow setting default order for property when registering a `Doctrine\Orm\Filter\OrderFilter` instance
+* Allow setting default order for property when registering a `Doctrine\Orm\Filter\OrderFilter` instance