[diff.cpp.library] Add new C23 headers to list of new headers

Author: AlisdairM

source/compatibility.tex

@@ -187,7 +187,9 @@
 \libheaderrefx{inplace_vector}{inplace.vector.syn},
 \libheaderref{linalg},
 \libheaderref{rcu},
-\libheaderref{simd}, and
+\libheaderref{simd},
+\libheaderref{stdbit.h},
+\libheaderref{stdckdint.h}, and
 \libheaderrefx{text_encoding}{text.encoding.syn}.
 Valid \CppXXIII{} code that \tcode{\#include}{s} headers with these names may be
 invalid in this revision of \Cpp{}.