chore: update gsoc-2025.md (#4779)

Project description updated

Author: Belosnegova

docs/topics/gsoc-2025.md

@@ -79,9 +79,9 @@ Yahor Berdnikau, Bálint Hegyi, and Reinhold Degenfellner
   Create a Gradle plugin which exposes a specific task. This task should, in the presence of the Kotlin Gradle Plugin, retrieve all the Kotlin sources’ structures and output them.
   Including tests would be a bonus.
 
-### Support Android and iOS targets in Kotlin Multiplatform for an existing Google service [Medium, 175 hrs]
+### Support Android and iOS targets in Kotlin Multiplatform for Gemini using Vertex AI in Firebase [Medium, 175 hrs]
 
-This project aims to create an open-source Kotlin Multiplatform (KMP) library that supports an existing Google service 
+This project aims to create an open-source Kotlin Multiplatform (KMP) library that supports Gemini using Vertex AI in Firebase 
 on at least Android and iOS. It will showcase best practices in creating KMP libraries for existing services,
 with a focus on appropriate production implementation (for example, proper API key management, user-managed API keys support, 
 and client throttling).