[Regression] Nonsense links are rendered when source generators are used

**Describe the bug**
When a public class internally uses the logger source generator, nonsense links are rendered in the output html of API docs.

**To Reproduce**
Steps to reproduce the behavior:
1. Create a class library that contains a public type, whose implementation uses the .NET logger source generator
2. Run docfx to generate the website

**Expected behavior**
Correct links are rendered, or the links are omitted entirely (which is what earlier docfx versions did).

**Actual behavior**
Nonsense links are rendered, for example:
```html

```

**Context (please complete the following information):**
- OS: Windows
- Docfx version: v2.79.0
- .NET version: .NET 9