update meetup link

use triangle bitdevs calendar rather than user page

Author: vnprc

_data/settings.yml

@@ -6,4 +6,4 @@ menu:
   - {name: 'Events', url: '/events'}
   - {name: 'Nostr', url: 'https://njump.me/npub18z4n70qxqv40xef4je7fd0zya462gmkhvf2eax695f6sfgrk9yvq55lrpv', external: true}
   - {name: 'Twitter', url: 'https://twitter.com/TriangleBitDevs', external: true}
-  - {name: 'Meetup', url: 'https://lu.ma/user/trianglebitdevs', external: true}
+  - {name: 'Meetup', url: 'https://lu.ma/trianglebitdevs', external: true}