chore(dom.js): Fix misspellings (#5008)

src/js/utils/dom.js

@@ -761,7 +761,7 @@ export function isSingleLeftClick(event) {
   // otherwise `mousedown` should be enough for a button
 
   if (event.button === undefined && event.buttons === undefined) {
-    // Why do we need `butttons` ?
+    // Why do we need `buttons` ?
     // Because, middle mouse sometimes have this:
     // e.button === 0 and e.buttons === 4
     // Furthermore, we want to prevent combination click, something like