docs: correct TypeScript spelling on the home page (vercel#52500)

### What?
Changing the word TypeScript with an uppercase S.

### Why?
- Because that's the official recommendation from TypeScript. (Reference: [typescriptlang.org](https://www.typescriptlang.org))
- The docs already uses this format (e.g. [TypeScript page](https://nextjs.org/docs/app/building-your-application/configuring/typescript)) so it's just a matter of consistency.

docs/index.mdx

@@ -26,7 +26,7 @@ Some of the main Next.js features include:
 | [Data Fetching](/docs/app/building-your-application/data-fetching)       | Simplified data fetching with async/await support in React Components and the `fetch()`s API that aligns with React and the Web Platform.                                                        |
 | [Styling](/docs/app/building-your-application/styling)                   | Support for your preferred styling methods, including CSS Modules, Tailwind CSS, and CSS-in-JS                                                                                                   |
 | [Optimizations](/docs/app/building-your-application/optimizing)          | Image, Fonts, and Script Optimizations to improve your application's Core Web Vitals and User Experience.                                                                                        |
-| [Typescript](/docs/app/building-your-application/configuring/typescript) | Improved support for TypeScript, with better type checking and more efficient compilation, as well as custom TypeScript Plugin and type checker.                                                 |
+| [TypeScript](/docs/app/building-your-application/configuring/typescript) | Improved support for TypeScript, with better type checking and more efficient compilation, as well as custom TypeScript Plugin and type checker.                                                 |
 | [API Reference](/docs/app/api-reference)                                 | Updates to the API design throughout Next.js. Please refer to the API Reference Section for new APIs.                                                                                            |
 
 ## How to Use These Docs