[Feature Request] - OpenAPI 3.2 support

[YOU54F]

Would be nice to get support for OpenAPI 3.2 in opc

• Announcement:- https://www.openapis.org/blog/2025/09/23/announcing-openapi-v3-2
• Spec: https://spec.openapis.org/oas/v3.2.0.html
• Release Notes: https://github.com/OAI/OpenAPI-Specification/releases/tag/3.2.0
• Migration guide: https://learn.openapis.org/upgrading/v3.1-to-v3.2.html

[pact-bot]

🤖 Great news! We've labeled this issue as SmartBear Supported and created a tracking ticket in PactFlow's Jira (PACT-5610). We'll keep work public and post updates here. Meanwhile, feel free to check out our docs. Thanks for your patience!