Highlight of feature policy incorrect for xr-spatial-tracking

[smarek]

highlighted part should be xr-spatial-tracking not just the xr part

I haven't tested all the features in https://github.com/w3c/webappsec-permissions-policy/blob/master/features.md#standardized-features so this might affect more

[Peneheals]

I can also confirm this lil' bug :)

[ScottHelme]

Try now for me, just deployed a fix!

[Peneheals]

It works, thank you!