Typo fix on code example on "attribute reflection" page (mdn#40689)

correcting typo mistake with span id name in code example

Author: tayloregivens

files/en-us/web/api/document_object_model/reflected_attributes/index.md

@@ -190,7 +190,7 @@ Setting the attribute value restores the relationship between the attribute and
 Continuing the example from above:
 
 ```js
-inputElement.setAttribute("aria-labelledby", "input1");
+inputElement.setAttribute("aria-labelledby", "label_1");
 
 attributeValue = inputElement.getAttribute("aria-labelledby");
 console.log(attributeValue);