Clarify comment

src/components/layers.rs

@@ -62,7 +62,7 @@ impl<L: PhysicsLayer> PhysicsLayer for &L {
 /// pub const FIRST_LAYER: LayerMask = LayerMask(1 << 0);
 /// pub const LAST_LAYER: LayerMask = LayerMask(1 << 31);
 ///
-/// // Bitwise operations unfortunately can't be const, so we need to access the `u32` values.
+/// // Bitwise operations for `LayerMask` unfortunately can't be const, so we need to access the `u32` values.
 /// pub const COMBINED: LayerMask = LayerMask(FIRST_LAYER.0 | LAST_LAYER.0);
 /// ```
 #[derive(Reflect, Clone, Copy, Debug, Deref, DerefMut, Eq, PartialOrd, Ord)]