fix: resolve nested example references in parameter definitions

[jhemelhof]

Pull Request

Description

Parameter example references weren't updated triggering exceptions when attempting to resolve them later on.

Fixes: #2229

Type of Change

• [x] 🐛 Bug fix

Checklist

• [x] I have added/updated tests as needed
• [ ] I have added/updated documentation where applicable
• [x] The PR title is descriptive
• [x] The code builds and passes tests locally
• [x] I have linked related issues (if any)