docs: Reword changelog for google gen ai integration (#17805)

`GoogleGenerativeAI` could be mistaken for a different SDK, and the
package name is also incorrect. It’s best to refer to this as the Google
Gen AI SDK, as described in the official documentation:
https://cloud.google.com/vertex-ai/generative-ai/docs/sdks/overview
.

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Updates CHANGELOG wording to use "Google Gen AI", rename
`GoogleGenerativeAI` to `GoogleGenAI`, and correct package from
`@google/generative-ai` to `@google/genai`.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
872d223. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: RulaKhaled

CHANGELOG.md

@@ -56,7 +56,7 @@ Work in this release was contributed by @Karibash. Thank you for your contributi
 
 - **feat(cloudflare,vercel-edge): Add support for Google Gen AI instrumentation ([#17723](https://github.com/getsentry/sentry-javascript/pull/17723))**
 
-  The SDK now supports manually instrumenting Google's Generative AI operations in Cloudflare Workers and Vercel Edge Runtime environments, providing insights into your AI operations. You can use `const wrappedClient = Sentry.instrumentGoogleGenAIClient(genAiClient)` to get an instrumented client.
+  The SDK now supports manually instrumenting Google's Gen AI operations in Cloudflare Workers and Vercel Edge Runtime environments, providing insights into your AI operations. You can use `const wrappedClient = Sentry.instrumentGoogleGenAIClient(genAiClient)` to get an instrumented client.
 
 ### Other Changes
 
@@ -94,9 +94,9 @@ Work in this release was contributed by @Karibash. Thank you for your contributi
 
   Note that if `Sentry.reportPageLoaded()` is not called within 30 seconds of the initial pageload (or whatever value the `finalTimeout` option is set to), the pageload span will be ended automatically.
 
-- **feat(core,node): Add instrumentation for `GoogleGenerativeAI` ([#17625](https://github.com/getsentry/sentry-javascript/pull/17625))**
+- **feat(core,node): Add instrumentation for `GoogleGenAI` ([#17625](https://github.com/getsentry/sentry-javascript/pull/17625))**
 
-  The SDK now automatically instruments the `@google/generative-ai` package to provide insights into your AI operations.
+  The SDK now automatically instruments the `@google/genai` package to provide insights into your AI operations.
 
 - **feat(nextjs): Promote `useRunAfterProductionCompileHook` to non-experimental build option ([#17721](https://github.com/getsentry/sentry-javascript/pull/17721))**