Add Austin.rb and RubyJax Meetups (ruby-conferences#1115)

Co-authored-by: marcoroth <6411752+marcoroth@users.noreply.github.com>

Author: github-actions[bot]

_data/meetups.yml

@@ -7634,3 +7634,17 @@
   start_time: 10:00:00 PDT
   end_time: 11:00:00 PDT
   url: https://www.meetup.com/ocruby/events/sdczltyhcnbkc
+
+- name: Austin.rb - Social @ Hi Sign Brewing
+  location: Austin , TX
+  date: 2025-10-28
+  start_time: 18:30:00 CDT
+  end_time: 20:30:00 CDT
+  url: https://www.meetup.com/austinrb/events/305497352
+
+- name: RubyJax - Open Hax October 2025
+  location: Jacksonville, FL
+  date: 2025-10-28
+  start_time: 18:30:00 EDT
+  end_time: 20:00:00 EDT
+  url: https://www.meetup.com/rubyjax/events/llklbtyhcnblc