Merge branch '3.x' into 4.x

* 3.x:
  Update changelog
  Use conditional class name depending on the Monolog version
  Update RollbarNotifier to RollbarLogger in DI

Author: GromNaN

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## Unreleased
 
+* Fix `rollbar` handler to use `RollbarLogger`
+
 ## 4.0.0 (2025-11-27)
 
 * Add support for Symfony 8.0

src/DependencyInjection/MonologExtension.php

@@ -696,7 +696,7 @@ private function buildHandler(ContainerBuilder $container, string $name, array $
                 } else {
                     $config = $handler['config'] ?: [];
                     $config['access_token'] = $handler['token'];
-                    $rollbar = new Definition(\RollbarNotifier::class, [
+                    $rollbar = new Definition(\Rollbar\RollbarLogger::class, [
                         $config,
                     ]);
                     $rollbarId = 'monolog.rollbar.notifier.'.sha1(json_encode($config));