Fixup: programs may *partially* specialize basic_common_reference

Author: CaseyCarter

source/utilities.tex

@@ -17192,7 +17192,7 @@
 
 \pnum
 Note D: Notwithstanding the provisions of \ref{meta.type.synop}, and
-pursuant to \ref{namespace.std}, a program may specialize
+pursuant to \ref{namespace.std}, a program may partially specialize
 \tcode{basic_common_reference<T, U, TQual, UQual>}
 for types \tcode{T} and \tcode{U} such that
 \tcode{is_same_v<T, decay_t<T>{>}} and