Add RubyRussia 2024 (ruby-conferences#765)

Author: marcoroth

_data/conferences.yml

@@ -2731,6 +2731,13 @@
   cfp_link: https://docs.google.com/forms/d/e/1FAIpQLSdTKiwbhAo4leeOl-HPIG2gFVzvmWjEtBFV6mC4ueY2Gso44g/viewform
   announced_on: 2023-11-30
 
+- name: RubyRussia 2024
+  location: Moscow, Russia
+  start_date: 2024-10-02
+  end_date: 2024-10-02
+  url: https://rubyrussia.club/
+  twitter: railsclub_ru
+
 - name: Matsue RubyKaigi 11
   location: Matsue, Japan
   start_date: 2024-10-05