Add changelog for online view of HTML artifacts

app/views/projects/artifacts/_tree_file.html.haml

 - blob = file.blob
-- is_external_link = external_link?(blob)
+- is_external_link = external_url?(blob)
 - path_to_file = link_to_artifact(@project, @build, file)
 
 %tr.tree-item.js-artifact-tree-row{ data: { link: path_to_file, external_link: "#{is_external_link}" } }

changelogs/unreleased/34102-online-view-of-artifacts-fe.yml

+---
+title: Add online view of HTML artifacts for public projects
+merge_request: 14399
+author:
+type: added