Link to 'day 2' YouTube live stream

While also keeping a link to 'day 1'. tested with 'hugo serve'

Author: raboof

content/_index.md

@@ -37,6 +37,6 @@ join at [#nixcon:matrix.org](https://matrix.to/#/#nixcon:matrix.org)
 
 Owncast: https://live.nixos.org/
 
-Youtube: https://www.youtube.com/watch?v=oAzkHpSWhaI
+Youtube: [day 1](https://www.youtube.com/watch?v=oAzkHpSWhaI) [day 2](https://www.youtube.com/watch?v=_7wqXN-7ebw)
 
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