[meta.reflection.layout] Reverse logic in specification

Fixes NB US 106-167 (C++26 CD).

Author: k3DW

source/meta.tex

@@ -5851,7 +5851,7 @@
 non-static data member that is not a bit-field,
 direct base class relationship, or
 data member description $(T, N, A, W, \mathit{NUA})$\iref{class.mem.general}
-where $W$ is not $\bot$.
+where $W$ is $\bot$.
 \item
 If \tcode{dealias(r)} represents a type,
 then \tcode{is_complete_type(r)} is \tcode{true}.