Update documentation for the new Entity header

[bhashkarsharma]

Give us some context

• What problems does this PR solve?
  • This PR updates the documentation to match the new Entity header. It is related to another PR on the developer-website. Please refer to the Reviewer Notes on that PR for more details.
• Add any context that will help us review your changes such as testing notes, links to related docs, screenshots, etc.
  • Screenshots of new header with metadata and tags widgets:

• If your issue relates to an existing GitHub issue, please link to it.

[CLAassistant]

All committers have signed the CLA.

[github-actions]

Hi @bhashkarsharma 👋

Thanks for your pull request! Your PR is in a queue, and a writer will take a look soon. We generally publish small edits within one business day, and larger edits within three days.

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[gatsby-cloud]

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[bradleycamacho]

Hi @bhashkarsharma , thanks for opening this PR! Could you sign the CLA by clicking the yellow button above so I can merge this in once I review? Thanks!

[bhashkarsharma]

Hi @bradleycamacho, I have signed the CLA. Thanks!

[nbaenam]

Thank you for the update! I've added some TW edits and updated all the screenshots