fix: delete nonexistent output

vuejs/docs@6fad8c7#diff-4d47e7364676bfe0411297303264e00087269482dd4665c4fc9b139dfae30fbc

Author: naokie

src/guide/reactivity.md

@@ -77,7 +77,7 @@ const dinner = {
 
 const handler = {
   get(target, prop) {
-    console.log(‘intercepted!’)
+    console.log('intercepted!')
     return target[prop]
   }
 }