Update Tracking Data page

[PonteIneptique]

https://github.com/PerseusDL/tei-conversion-tools/wiki/Tracking-Data should reflect the fact that we now have Hook.

[balmas]

@PonteIneptique I have put the basics of the hook test procedure on this page now. Please feel free to correct or augment.

[balmas]

or if you're happy with it, close the issue :)