The source project of this merge request has been removed.
generate: Fix links to callbacks in devhelp
The symbols under callbacks in the menu are borked without this.
Also make the Function_macros
label better correspond to what is in the Namespaces template:
Though, ideally we would generate both FRAGMENTS
and https://gitlab.gnome.org/jtojnar/gi-docgen/-/blob/fdab9972ccd0636fa0f48c1c39ba1d3143a60fa8/gidocgen/templates/basic/namespace.html#L148-159 from the same data.