Avoid wrong markdown links in the docs
The IconView/TreeView's documentation has various [keybinding signal][GtkSignalAction]
which are wrong as they neither point to an item nor are valid markdown
so you end up with such result
CellView has [Pango text markup language][PangoMarkupFormat]
TreeView has also [tree widget conceptual overview][TreeWidget]
I wanted to open a PR but I'm not sure what would be the right way to approach this case