Fix pnpm command and first tsx example in typescript.mdx (#943)

Author: jackiedeng0

src/routes/configuration/typescript.mdx

@@ -95,7 +95,7 @@ yarn dlx tsc --init
 
 <div id="pnpm">
 ```bash frame="none"
-pnpm dlx tsc --init
+pnpm tsc --init
 ```
 </div>
 
@@ -129,17 +129,17 @@ bunx tsc --init
 4. Create a TypeScript or `.tsx` file to test the setup.
 
 ```typescript
-import { type Component } from "solid-js"
+import { type Component } from "solid-js";
 
-function MyTsComponent(): JSX.Element {
+const MyTsComponent(): Component = () => {
 	return (
 		<div>
 			<h1>This is a TypeScript component</h1>
 		</div>
-	)
+	);
 }
 
-export default MyTsComponent
+export default MyTsComponent;
 ```
 
 If using an existing JavaScript component, import the TypeScript component: