Show Pipeline(not Job) in MR desktop notification

Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/27955

app/views/projects/merge_requests/widget/_show.html.haml

@@ -16,13 +16,13 @@
     gitlab_icon: "#{asset_path 'gitlab_logo.png'}",
     ci_status: "#{@merge_request.head_pipeline ? @merge_request.head_pipeline.status : ''}",
     ci_message: {
-      normal: "Job {{status}} for \"{{title}}\"",
+      normal: "Pipeline {{status}} for \"{{title}}\"",
       preparing: "{{status}} job for \"{{title}}\""
     },
     ci_enable: #{@project.ci_service ? "true" : "false"},
     ci_title: {
       preparing: "{{status}} job",
-      normal: "Job {{status}}"
+      normal: "Pipeline {{status}}"
     },
     ci_sha: "#{@merge_request.head_pipeline ? @merge_request.head_pipeline.short_sha : ''}",
     ci_pipeline: #{@merge_request.head_pipeline.try(:id).to_json},

changelogs/unreleased/27955-mr-notification-use-pipeline-language.yml

+---
+title: Show Pipeline(not Job) in MR desktop notification
+merge_request:
+author: