Custom widgets CORS issue in Safari is still persists even after latest release of developer portal version 2.29.0

> [!IMPORTANT]
> **PLEASE DO NOT CREATE ISSUES RELATED TO MANAGED DEVELOPER PORTAL IN THIS REPOSITORY**. Issues related to "Managed developer portal" will be closed automatically. Managed developer portal issues should be created directly in Azure Support + Troubleshooting in Azure portal. Contact Azure support (or) submit a post [on Stack Overflow](http://aka.ms/apimso). Feature requests can be raised [on the Azure Feedback Forum](https://aka.ms/apimwish).

Every self-hosted developer bug report should have precise description and reproduction steps; console traces (or) source code references are appreciated.

## Bug description

Custom widgets CORS issue in Safari is still persists

## Reproduction steps

1. Go to 'https://apiportal.avnet.com'
2. Click on 'Signup' page.
3. Sign up widget is custom widget and it is not loading as CORS error is generated.
4. See error as per attached image.

## Expected behavior

Signup Custom widget should be load properly. as latest release of developer portal.

this is managed developer portal but as latest release of managed developer portal, custom widget issue in Mac OD - Safari has been resolved in "[api-management-developer-portal](https://github.com/Azure/api-management-developer-portal/releases/tag/2.29.0)" - release version 2.29.0 (commit id https://github.com/Azure/api-management-developer-portal/pull/2498)

as this developer portal changes is already released on my APIM, it should be reflected over there.

## Is self-hosted portal?
No.

## Release tag or commit SHA.

Release version : [2.29.0](https://github.com/Azure/api-management-developer-portal/releases/tag/2.29.0)
Commit id: https://github.com/Azure/api-management-developer-portal/pull/2498 (commit: 0ab6508eba4967ef82e48163aa20a18748fa28ea)

## API Management service name

avt-prd-wus2-apim-002

## Environment

- Operating system: Mac OS (OS version Sonoma 14.5)
- Browser: Safari
- Version: 17.5

## Additional context

Please find the attached screenshot.




This report explicitly says it concerns the managed developer portal, not the self-hosted repository, so do not start a repository change. Use the listed API Management service, Safari 17.5 on macOS Sonoma details, screenshots, and release 2.29.0 reference when contacting Azure Support or submitting the issue through the Azure portal.

Written by the indexing model from the issue text.