Document BC break in AbstractController::render

Author: GromNaN

CHANGELOG.md

@@ -6,6 +6,7 @@ CHANGELOG
 
  * Add `HttpClientAssertionsTrait`
  * Add `AbstractController::renderBlock()` and `renderBlockView()`
+ * Remove call to `renderView()` in `AbstractController::render()`
  * Add native return type to `Translator` and to `Application::reset()`
  * Deprecate the integration of Doctrine annotations, either uninstall the `doctrine/annotations` package or disable the integration by setting `framework.annotations` to `false`
  * Enable `json_decode_detailed_errors` context for Serializer by default if `kernel.debug` is true and the `seld/jsonlint` package is installed