updating the title of the september tech talk meetup for austin.rb (#725)

* updating the title of the september tech talk meetup for austin.rb

* fixing issue with ':' by wrapping name in quotes

Author: nhessler

_data/meetups.yml

@@ -1429,7 +1429,7 @@
   end_time: 20:00:00 EDT
   url: https://lu.ma/af2n3jwa
 
-- name: Austin.rb - Placeholder
+- name: "Austin.rb - Visualizing Problems: From Abstract to Concrete"
   location: Austin, TX
   date: 2024-09-10
   start_time: 18:30:00 CDT