Fix broken GNLYC link

[mkasberg]

The link for the General Norms for the Liturgical Year and the
Calendar was broken. This links to a working version.

[igneus]

Thanks, I didn't notice the link is dead now. I would, however, strongly prefer a link target hosted and managed by a competent church authority, not a private person.

[mkasberg]

It is surprisingly hard to find this text from a good authority. I found an EWTN source (probably a migrated copy of your original link); this seems to be about the best I was able to find. There's a pdf hosted as wordpress content on the Archdiocese of Baltimore website if you'd prefer that ¯\_(ツ)_/¯

[igneus]

Thanks, this link target is of "equal quality/authority" with the one being replaced. Merging.