chore: initial linting fixes for JS in docs/fiddles (#37689)

docs/fiddles/features/keyboard-shortcuts/web-apis/renderer.js

@@ -1,6 +1,6 @@
 function handleKeyPress (event) {
   // You can put code here to handle the keypress.
-  document.getElementById("last-keypress").innerText = event.key
+  document.getElementById('last-keypress').innerText = event.key
   console.log(`You pressed ${event.key}`)
 }