Update changelog and versions for release 3.29.3

Author: Cawllec

CHANGELOG.md

@@ -1,7 +1,7 @@
 Changelog
 =========
 
-## TBD
+## 3.29.3 (2025-03-06)
 
 ### Fixes
 

src/Configuration.php

@@ -85,7 +85,7 @@ class Configuration implements FeatureDataStore
      */
     protected $notifier = [
         'name' => 'Bugsnag PHP (Official)',
-        'version' => '3.29.2',
+        'version' => '3.29.3',
         'url' => 'https://bugsnag.com',
     ];