[Docs]: Update Docs for Proper `#[layout]` and `#[end_layout]` Macros Usage in Enums

Hiya ( ´ ω ` )ノﾞ,

This is not a critical issue, but I’ve noticed a bug with layout and routes ordering when defining multiple layouts for different pages.

Here’s an example that works:

```rust
#[derive(Clone, Routable, Debug, PartialEq, Serialize, Deserialize)]
pub enum Route {
#[layout(HomeNavBar)]
#[route("/")]
Home {},
#[end_layout]

#[layout(LoginNavBar)]
#[route("/login")]
Login {},
#[end_layout]

#[route("/dashboard")]
Dashboard {},
}
```

However, if you reorder the routes like this:

```rust
#[derive(Clone, Routable, Debug, PartialEq, Serialize, Deserialize)]
pub enum Route {
#[layout(HomeNavBar)]
#[route("/")]
Home {},
#[end_layout]

#[route("/dashboard")] // Notice this route between the layouts
Dashboard {},

#[layout(LoginNavBar)]
#[route("/login")]
Login {},
#[end_layout]
}
```

The routing doesn’t work as expected.

Just wanted to raise this to your attention.

Best