fix: revert netlify back to v15

[Rajdeepc]

Description

Updating netlify to v17.0.0 caused issues in publishing the VRTs site.

Reference

• 4432

Motivation and context

How has this been tested?

• [ ] Test case 1
  1. Go here
  2. Do this
• [ ] Test case 2
  1. Go here
  2. Do this

Screenshots (if appropriate)

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Chore (minor updates related to the tooling or maintenance of the repository, does not impact compiled assets)

Checklist

• [x] I have signed the Adobe Open Source CLA.
• [x] My code follows the code style of this project.
• [ ] If my change required a change to the documentation, I have updated the documentation in this pull request.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.
• [ ] I have reviewed at the Accessibility Practices for this feature, see: Aria Practices

Best practices

This repository uses conventional commit syntax for each commit message; note that the GitHub UI does not use this by default so be cautious when accepting suggested changes. Avoid the "Update branch" button on the pull request and opt instead for rebasing your branch against main.

[github-actions[bot]]

Branch preview

• Documentation Site
• Storybook

[github-actions[bot]]

Tachometer results

Currently, no packages are changed by this PR...

[github-actions[bot]]

Lighthouse scores

Category	Latest (report)	Main (report)	Branch (report)
Performance	0.99	0.99	0.99
Accessibility	1	1	1
Best Practices	1	1	1
SEO	1	0.92	0.92
PWA	1	1	1

What is this?

[Lighthouse](https://github.com/GoogleChrome/lighthouse) scores comparing the documentation site built from the PR ("Branch") to that of the production documentation site ("Latest") and the build currently on main ("Main"). Higher scores are better, but *note that the SEO scores on Netlify URLs are artifically constrained to 0.92.*

Transfer Size

Category	Latest	Main	Branch
Total	224.801 kB	210.317 kB 🏆	210.502 kB
Scripts	54.136 kB	48.186 kB 🏆	48.214 kB
Stylesheet	34.937 kB	30.34 kB 🏆	30.467 kB
Document	5.918 kB	5.186 kB 🏆	5.188 kB
Font	126.85 kB	126.605 kB 🏆	126.633 kB

Request Count

Category	Latest	Main	Branch
Total	48	45	45
Scripts	37	37	37
Stylesheet	5	5	5
Document	1	1	1
Font	2	2	2