changelog.

changelog.md

@@ -1,5 +1,13 @@
 # `bytemuck` changelog
 
+## 1.17.1
+
+* Adds `#[repr(C)]` to the `union Transmute<A, B>` type that's used internally
+  for most of the transmutations. This doesn't matter in any current case and
+  there's no actual bug being fixed here, but it's a mild futureproof, and it's
+  probably best practice to have for when people who know the code less deeply
+  try to copy what we're doing into other contexts, so we'll go with it.
+
 ## 1.17.0
 
 * Makes the `must_cast` versions of the by-value and by-ref casts be `const`.