GSoC-participants: add link to organization archive page

Author: sivaraam

GSoC-Participants.md

@@ -16,7 +16,7 @@ to Git via GSoC.
 
 #### References
 
--[GSoC archive](TODO)
+-[GSoC archive](https://summerofcode.withgoogle.com/programs/2025/organizations/git)
 -[Rev News article](https://git.github.io/rev_news/2025/05/31/edition-123/)
 
 ### 2024