fix: create a const for the counter object (#693)

Author: ubmit

src/routes/concepts/context.mdx

@@ -241,8 +241,8 @@ import { createSignal, createContext, useContext } from "solid-js";
 const CounterContext = createContext(); // create context
 
 export function CounterProvider(props) {
-	const [count, setCount] = createSignal(props.count || 0),
-	counter = [
+	const [count, setCount] = createSignal(props.count || 0);
+	const counter = [
 		count,
 		{
 			increment() {