typo

Author: RalfJung

src/behavior-considered-undefined.md

@@ -55,7 +55,7 @@ code.
   * Invalid values for a type with a custom definition of invalid values.
 
     > **Note**: For `rustc`, those types are [`NonNull<T>`] and [`NonZero*`].
-    > Requesting custom invalid types requires the unstable `rustc_layout_scalar_valid_range_*` attributes.
+    > Requesting custom invalid values requires the unstable `rustc_layout_scalar_valid_range_*` attributes.
 
 A reference/pointer is "dangling" if it is null or not all of the bytes it
 points to are part of the same allocation (so in particular they all have to be