openapi: fix nested params (#26894)

[Dazz321]

• Check for 'object' in ['object', 'null']
  How do I work this plz help

• Add updated decorated files

• arrays can also be null with this format

Co-authored-by: Rachael Sewell [email protected]

• arrays can also be null with this format

Co-authored-by: Rachael Sewell [email protected]

Co-authored-by: Rachael Sewell [email protected]

Why:

Closes [issue link]

What's being changed:

Check off the following:

• I have reviewed my changes in staging (look for "Automatically generated comment" and click Modified to view your latest changes).
• For content changes, I have completed the self-review checklist.

Writer impact (This section is for GitHub staff members only):

• This pull request impacts the contribution experience
  • I have added the 'writer impact' label
  • I have added a description and/or a video demo of the changes below (e.g. a "before and after video")

[mistaken-pull-closer]

Thanks for your submission.

It appears that you've created a pull request using one of our repository's branches. Since this is
almost always a mistake, we're going to go ahead and close this. If it was intentional, please
let us know what you were intending and we can see about reopening it.

Thanks again!

[github-actions]

👋 Hey there spelunker. It looks like you've modified some files that we can't accept as contributions. The complete list of files we can't accept are:
.devcontainer/**
.github/actions-scripts/**
.github/workflows/**
.github/CODEOWNERS
assets/fonts/**
data/graphql/**
Dockerfile*
lib/graphql/**
lib/redirects/**
lib/rest/**
lib/webhooks/**
lib/search/indexes/**
package*.json
scripts/**
translations/**
content/actions/deployment/security-hardening-your-deployments/**

You'll need to revert all of the files you changed in that list using GitHub Desktop or git checkout origin/main <file name>. Once you get those files reverted, we can continue with the review process.