chore: add the missing in comment (#2978)

Signed-off-by: jingchanglu <jingchanglu@outlook.com>

examples/login_form.rs

@@ -2,7 +2,7 @@
 //!
 //! This example demonstrates how to implement a login form using Dioxus desktop. Since forms typically navigate the
 //! page on submit, we need to intercept the onsubmit event and send a request to a server. On the web, we could
-//! just leave the submit action` as is, but on desktop, we need to handle the form submission ourselves.
+//! just leave the `submit action` as is, but on desktop, we need to handle the form submission ourselves.
 //!
 //! Todo: actually spin up a server and run the login flow. Login is way more complex than a form override :)