Fix link to post in README

[kittywitch]

Resolves #736

[Olical]

Oh!? I went to merge yours thinking it was another broken link and just realised I just merged another one for the same link. What is that timing! So, uh, this is applied but from another coincidental PR from within < 12 hours of each other, that's odd. Thank you for this though, it's a good catch and the old link should really work, I will update my Obsidian thing so the old link continues to work, even though this fix is also correct.

Thanks!

[Olical]

Ah this DID work, but Obsidian updated and now it's aliases not alias. I just need to update the name of the property where ever I used it.