Add Krakow Ruby Users Luma Group (#1185)

Author: lcmen

_data/meetup_groups.yml

@@ -303,6 +303,11 @@
   name: Krakow Ruby Users Group (KRUG)
   service: meetupdotcom
 
+- id: krakow-ruby-users-group
+  name: Krakow Ruby Users Group (KRUG)
+  service: luma
+  ical_url: https://api.lu.ma/ics/get?entity=calendar&id=cal-EyyObsvyunM3PQP
+
 - id: krugtvm
   name: Kerala Ruby User Group
   service: meetupdotcom