Update Austin.rb, Ruby Malaysia and add Puna Ruby (#1182)

Co-authored-by: Marco Roth <marco.roth@intergga.ch>

Author: github-actions[bot]

_data/meetups.yml

@@ -7653,7 +7653,7 @@
   end_time: 13:00:00 IST
   url: https://lu.ma/4zo2m8i2
 
-- name: Austin.rb - Placeholder (Tech Talk) September 2025
+- name: Austin.rb - Declarative Programming at Enterprise Scale
   location: Austin, TX
   date: 2025-09-09
   start_time: 18:30:00 CDT
@@ -7869,7 +7869,14 @@
   date: 2025-09-18
   start_time: 19:00:00 +08
   end_time: 20:00:00 +08
-  url: https://www.meetup.com/ruby-malaysia/events/fnnnstyhcmbxb
+  url: https://www.meetup.com/ruby-malaysia/events/310763715
+
+- name: Pune Ruby Meetup - September Ruby Meetup
+  location: Maharashtra 411057, India
+  date: 2025-09-20
+  start_time: 11:00:00 IST
+  end_time: 13:00:00 IST
+  url: https://lu.ma/4zo2m8i2
 
 - name: Pune Ruby Meetup - September Ruby Meetup
   location: Maharashtra 411057, India