[TIMEOUT] Increase timeout on notify/changelog job

* Increase the timeout to 4h because of increased overload on CI/CD
pipeline

manifest-pipeline-yocto.yml

@@ -347,6 +347,7 @@ retrigger:
 changelog:
   stage: changelog
   extends: .infrastructure
+  timeout: 4h
   tags:
     - send_notify
   allow_failure: true
@@ -375,6 +376,7 @@ changelog:
 
 notify:
   stage: notify
+  timeout: 4h
   image: 
     name: mcr.microsoft.com/azure-cli
     entrypoint: [""]