XrCoordinateSpaceCreateInfoML missing from its extension in xr.xml

In xr.xml:3552, the `XrCoordinateSpaceCreateInfoML` struct is defined under a comment reading ``. However, the defintion for the `XR_ML_compat` extension (xr.xml:11867) does not contain a corresponding `` tag for `XrCoordinateSpaceCreateInfoML`. As far as I can tell, this is the only issue like this in the spec.

It is causing issues for me because I am trying to build an automated tool that parses data from xr.xml, and this anomaly is throwing a wrench in things.

Open xr.xml around lines 3552 and 11867, compare the XR_ML_compat structs with the extension's type declarations, and inspect how the surrounding entries are represented. The work is done when XrCoordinateSpaceCreateInfoML is declared consistently in the XR_ML_compat extension and the XML remains valid for automated parsing.

Written by the indexing model from the issue text.