chore(main): release google-shopping-merchant-notifications 0.4.0 (#34554)

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

Author: release-please[bot]

.release-please-manifest.json

@@ -1023,7 +1023,7 @@
   "google-shopping-merchant-lfp-v1+FILLER": "0.0.0",
   "google-shopping-merchant-lfp-v1beta": "0.8.0",
   "google-shopping-merchant-lfp-v1beta+FILLER": "0.0.0",
-  "google-shopping-merchant-notifications": "0.3.0",
+  "google-shopping-merchant-notifications": "0.4.0",
   "google-shopping-merchant-notifications+FILLER": "0.0.0",
   "google-shopping-merchant-notifications-v1": "0.3.1",
   "google-shopping-merchant-notifications-v1+FILLER": "0.0.0",

google-shopping-merchant-notifications/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+### 0.4.0 (2026-06-11)
+
+#### Features
+
+* update gapic-common dependency to 1.3 and document retry jitter ([#34061](https://github.com/googleapis/google-cloud-ruby/issues/34061)) 
+
 ### 0.3.0 (2026-03-31)
 
 #### Features

google-shopping-merchant-notifications/lib/google/shopping/merchant/notifications/version.rb

@@ -21,7 +21,7 @@ module Google
   module Shopping
     module Merchant
       module Notifications
-        VERSION = "0.3.0"
+        VERSION = "0.4.0"
       end
     end
   end