Renaming value doesn't change in rsx macro

When we rename the value, it doesn't change the value if its inside a string. but it changes in rust code.

```rs
pub fn component() -> Element {
    let mut username = use_signal(|| "".to_string());

    rsx! {
        input {
            r#type: "text",
            value: "{username}",
        }
    }
}
```