Outdated example models on the website

Following https://github.com/IfcOpenShell/IfcOpenShell/issues/6886, it seems models on the website are outdated.

E.g. https://ifc43-docs.standards.buildingsmart.org/IFC/RELEASE/IFC4x3/HTML/annex_e/alignment-geometries-and-linear-positioning/linear-placement-of-signal.html

Though when I click "Edit on Github"

It opens a page with the correct file version - e.g. it's using `IFC4X3_ADD2` schema instead of `IFC4X3_DEV_7e95fe8`.

https://github.com/buildingSMART/IFC4.3.x-sample-models/blob/main/models/alignment-geometries-and-linear-positioning/linear-placement-of-signal/linear-placement-of-signal.ifc