fix: mistakes in last 4.9 article

src/content/blog/astro-490.mdx

@@ -52,7 +52,7 @@ const container = await AstroContainer.create();
 console.log(await container.renderToString(Component));
 ```
 
-The posibilities that this API adds are endless, but this is just a first step. Our main focus at this stage is to make it easier to render Astro components inside test frameworks powered by Vite, such as Vitest.
+The possibilities that this API adds are endless, but this is just a first step. Our main focus at this stage is to make it easier to render Astro components inside test frameworks powered by Vite, such as Vitest.
 
 ```ts
 import { experimental_AstroContainer as AstroContainer } from 'astro/container';
@@ -84,7 +84,7 @@ To learn more about the Container API and how to use it, check out the [Containe
 
 ## React 19 support
 
-The first React 19 release candidate is out, and Astro came prepared. We added full support for React 19 to the React adapter with some added goodies for Astro Actions.
+The first React 19 release candidate is out, and Astro came prepared. We added full support for React 19 to the React integration with some added goodies for Astro Actions.
 
 To use React 19 in your Astro project, [follow the React 19 beta installation guide.](https://react.dev/blog/2024/04/25/react-19-upgrade-guide#installing) This unlocks React's new form actions feature, which lets you call Actions from a `<form>` and track "pending" and "result" values in your components.