Search won't find matches for API members or types if I specify them by the name they've been given in C#

**Your Godot version:**
4.0.2

**Issue description:**
Search won't find matches for API members or types if I specify them by the name they've been given in C#.

This means I have to translate them to the original notation first (e.g. `AddSibling` -> `add_sibling` before I can find the docs for this method).

**URL to the documentation page (if already existing):**
