Fix dead freedesktop desktop-entry spec link. (#21918)

# Objective

Fixes a dead link in the docs.

## Solution

Updated the link to the new address.

## Testing

- Following the link seems to lead to the correct place.

Co-authored-by: François Mockers <[email protected]>

Author: raldone01

crates/bevy_window/src/window.rs

@@ -174,7 +174,7 @@ pub struct Window {
     pub title: String,
     /// Stores the application ID (on **`Wayland`**), `WM_CLASS` (on **`X11`**) or window class name (on **`Windows`**) of the window.
     ///
-    /// For details about application ID conventions, see the [Desktop Entry Spec](https://specifications.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html#desktop-file-id).
+    /// For details about application ID conventions, see the [Desktop Entry Spec](https://specifications.freedesktop.org/desktop-entry/latest/file-naming.html#desktop-file-id).
     /// For details about `WM_CLASS`, see the [X11 Manual Pages](https://www.x.org/releases/current/doc/man/man3/XAllocClassHint.3.xhtml).
     /// For details about **`Windows`**'s window class names, see [About Window Classes](https://learn.microsoft.com/en-us/windows/win32/winmsg/about-window-classes).
     ///