Add note linking to new contributor docs sections

Author: edwardchalstrey1

content/gsoc_2026.md

@@ -25,6 +25,8 @@ If we think that you might be a good match for Gambit in GSoC 2026, we will then
 
 We will endeavour to acknowledge all enquiries, but please be patient during this very busy period.
 
+**Like many open-source projects, Gambit has documentation with guidance for contributions. We recommend GSoC students review this in advance of submitting any contributions or comments on GitHub, in particular the recently added [New Contributors](https://gambitproject.readthedocs.io/en/latest/developer.contributing.html#a-note-for-new-contributors) and [Policy on AI-Assisted Contributions](https://gambitproject.readthedocs.io/en/latest/developer.contributing.html#policy-on-ai-assisted-contributions) sections.**
+
 ## Project Ideas
 
 Prospective contributors should read through the project ideas listed below before submitting an application, following the Contributor Guidance above.