Update page layout documentation

[keharper]

Type of Doc:

• New topic
• Topic Update, Devdoc link: https://devdocs.magento.com/guides/v2.2/frontend-dev-guide/layouts/layout-types.html
• Other

Magento 2 GitHub Issue: magento/magento2#4454

Magento 2 GitHub PR: magento/magento2#14205

Magento 2 version:

• 2.1.X
• 2.2.X
• 2.3.X
• back port
• forward port

Notifications of Changes:

• Changes to Admin interface?
• New software requirements?
• New REST endpoints or updated GraphQL query syntax?
• New command line option?

Content:

The page_layout.xsd file was updated to allow head and body page layout types. At minimum, update Layout file types, but you might also need to create new examples that show how to update the head and/or body of a page.

Additional information:

[shrielenee]

Reference the GH issue (magento/magento2#4454) and PR (magento/magento2#14205) linked in the description for information on what to add or revise in the noted page.

[jeff-matthews]

@bdenham, can you handle this this week? If not, let's talk about reassigning it. Apparently, there are some support tickets that would benefit from this info.

[bdenham]

@jeff-matthews, sure, I'll make sure it gets done this week.

[ajithkumar-maragathavel]

@magento I am working on this