jjbb: cosmetic change in the github checks (#38)

Author: v1v

.ci/jobs/elastic-agent-mbp.yml

@@ -12,7 +12,7 @@
           discover-pr-forks-trust: permission
           discover-pr-origin: merge-current
           discover-tags: true
-          notification-context: 'internal-ci'
+          notification-context: 'beats-ci'
           repo: elastic-agent
           repo-owner: elastic
           credentials-id: 2a9602aa-ab9f-4e52-baf3-b71ca88469c7-UserAndToken