Update Montreal.rb and Columbus Ruby Meetups (ruby-conferences#1111)

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

Author: github-actions[bot]

_data/meetups.yml

@@ -6865,7 +6865,7 @@
   end_time: 22:00:00 BST
   url: https://www.meetup.com/yorkdevelopers/events/308647166
 
-- name: Montreal.rb - JSON Serialization Options for Rails
+- name: Montreal.rb - JSON Response Strategies for Rails APls
   location: Montréal, Canada
   date: 2025-07-16
   start_time: 18:00:00 EDT
@@ -6933,7 +6933,7 @@
   date: 2025-07-21
   start_time: 18:00:00 EDT
   end_time: 20:00:00 EDT
-  url: https://www.meetup.com/columbusrb/events/nkdfrtyhckbcc
+  url: https://www.meetup.com/columbusrb/events/308635265
 
 - name: Miami Ruby Brigade - July 2025
   location: Coral Gables, FL