docs: fix setContext/getContext typo (#13901)

Author: plgingras88

documentation/docs/06-runtime/02-context.md

@@ -80,9 +80,9 @@ Context is not inherently reactive. If you need reactive values in context then
 ```svelte
 <!--- file: Child.svelte --->
 <script>
-	import { setContext } from 'svelte';
+	import { getContext } from 'svelte';
 
-	const value = setContext('counter');
+	const value = getContext('counter');
 </script>
 
 <p>Count is {value.count}</p>