VSD - remove the Beta name and link

As part of the Value Streams Dashboard General availability (GA), we need to update the page title.

Tasks

1. Remove (Beta) for the page name. Value Streams Dashboard (Beta) --> Value Streams Dashboard
2. Remove the link to the feedback issue.
3. Under the page title add link to the documentation on how to configure the page so that people understand how to use it and what value it can provide.
   • Text: The Value Streams Dashboard allows all stakeholders from executives to individual contributors to identify trends, patterns, and opportunities for software development improvements.
   • link: https://docs.gitlab.com/ee/user/analytics/value_streams_dashboard.html
4. The page title uses seems larger than page titles on other pages in the Analytics group and uses and H1 vs. H3 (for example, see the Value Stream Analytics page. Change the page title to a H3.
5. The table title is currently an H3, it should be a caption, based on Pajamas.