Update donal-mcbreen.md

Author: AmandaPerino

_world_speakers/2025/speakers/donal-mcbreen.md

@@ -5,11 +5,11 @@ first_name: Donal
 last_name: McBreen
 image_path: /assets/world/2024/images/speakers/d-mcbreen.jpg
 role:
-tagline: Lead Programmer, in the SIP team
+tagline: Lead Programmer (Security, Infrastructure and Performance)
 company: 37signals
 keynote: false
-github:
-linkedin:
+github: https://github.com/djmb
+linkedin: https://www.linkedin.com/in/donal-mcbreen-a8227a52/
 twitter:
 ---