Add Brighton Ruby 2025 Lightning Talk CFP

Author: marcoroth

_data/conferences.yml

@@ -2969,6 +2969,9 @@
   twitter: brightonruby
   mastodon: https://ruby.social/@brightonruby
   announced_on: 2024-06-19
+  cfp_link: https://forms.reform.app/goodscary/lightning-talks-at-brighton-ruby-2025-cfp/gci0d6
+  cfp_open_date: 2025-03-10
+  cfp_close_date: 2025-03-31
 
 - name: KansaiRubyKaigi08
   location: Kyoto, Japan