Fixed the breadcrumb title for help pages

Closes #35679

app/views/layouts/help.html.haml

+- @breadcrumb_title = "Help"
 - page_title    "Help"
 - header_title  "Help", help_path
 

changelogs/unreleased/help-page-breadcrumb-title-fix.yml

+---
+title: Fixed new navigation breadcrumb title on help pages
+merge_request:
+author: