Fix Component typing typo (#977)

Author: edemaine

src/routes/configuration/typescript.mdx

@@ -131,7 +131,7 @@ bunx tsc --init
 ```typescript
 import { type Component } from "solid-js";
 
-const MyTsComponent(): Component = () => {
+const MyTsComponent: Component = () => {
 	return (
 		<div>
 			<h1>This is a TypeScript component</h1>