Add Columbus Ruby, Miami Ruby and Portland Ruby Meetups (ruby-conferences#899)

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

Author: github-actions[bot]

_data/meetups.yml

@@ -3955,7 +3955,7 @@
   date: 2025-02-19
   start_time: 18:00:00 PST
   end_time: 20:00:00 PST
-  url: https://www.meetup.com/portland-ruby-brigade/events/nzpdntyhcdbzb
+  url: https://www.meetup.com/portland-ruby-brigade/events/305194628
 
 - name: Rails Taiwan - 高雄 Rails Meetup February 2025
   location: Kaohsiung, Taiwan
@@ -4376,3 +4376,17 @@
   start_time: 11:00:00 EAT
   end_time: 13:00:00 EAT
   url: https://www.meetup.com/african_ruby_community/events/hqdljtyhcgbzb
+
+- name: Columbus Ruby Brigade - Monthly Meetup April 2025
+  location: Columbus, OH
+  date: 2025-04-21
+  start_time: 18:00:00 EST
+  end_time: 20:00:00 EST
+  url: https://www.meetup.com/columbusrb/events/nwmbptyhcgbcc
+
+- name: Miami Ruby Brigade - April 2025
+  location: Coral Gables, FL
+  date: 2025-04-21
+  start_time: 19:00:00 EST
+  end_time: 21:00:00 EST
+  url: https://www.meetup.com/miamirb/events/pdvctsyhcgbcc