chore: Fix clippy for upcoming 1.79 Rust release (#12727)

1.79 is due for release in a week.
Release Notes:

- N/A

crates/gpui/src/platform/mac/display_link.rs

@@ -201,7 +201,7 @@ mod sys {
 
     #[link(name = "CoreFoundation", kind = "framework")]
     #[link(name = "CoreVideo", kind = "framework")]
-    #[allow(improper_ctypes)]
+    #[allow(improper_ctypes, unknown_lints, clippy::duplicated_attributes)]
     extern "C" {
         pub fn CVDisplayLinkCreateWithActiveCGDisplays(
             display_link_out: *mut *mut CVDisplayLink,

crates/gpui/src/taffy.rs

@@ -63,7 +63,9 @@ impl TaffyLayoutEngine {
             let parent_id = self
                 .taffy
                 // This is safe because LayoutId is repr(transparent) to taffy::tree::NodeId.
-                .new_with_children(taffy_style, unsafe { std::mem::transmute(children) })
+                .new_with_children(taffy_style, unsafe {
+                    std::mem::transmute::<&[LayoutId], &[taffy::NodeId]>(children)
+                })
                 .expect(EXPECT_MESSAGE)
                 .into();
             self.children_to_parents