Add back BOSC CollaborationFest with link.

Author: sdhutchins

_data/previous_hackathons.yml

@@ -1,8 +1,3 @@
-- date: "July 23-24, 2025"
-  loc: "BOSC CollaborationFest with CAFA and others"
-  link: TBD
-  community:  
-
 - date: "May 12-15, 2025"
   loc: "BioAI Hackathon at the University of Warsaw"
   link: TBD

_data/upcoming_hackathons.yml

@@ -3,6 +3,11 @@
   link: https://goo.gl/forms/BijIwPgPo7nhtdG03
   community:
 
+- date: "July 23-24, 2025"
+  loc: "BOSC CollaborationFest with CAFA and others"
+  link: https://www.open-bio.org/events/bosc-2025/ismb-collaborationfest-2025/
+  community:  
+
 - date: "September 8-12, 2025"
   loc: "NCBI Comparative Genomics Codeathon: Advancing human health through collaborative discovery"
   link: https://ncbiinsights.ncbi.nlm.nih.gov/event/2025cgcodeathon/