[concept.regularinvocable], [iterator.concept.winc] Replace "annotation" with "comment"

Fixes NB US 71-128 (C++26 CD).

Author: eisenwave

source/concepts.tex

@@ -1261,8 +1261,8 @@
 equality-preserving\iref{concepts.equality} and
 shall not modify the function object or the arguments.
 \begin{note}
-This requirement supersedes the annotation in the definition of
-\libconcept{invocable}.
+This requirement supersedes the ``not required to be equality-preserving'' comment
+in the definition of \libconcept{invocable}.
 \end{note}
 
 \pnum

source/iterators.tex

@@ -1588,7 +1588,8 @@
 and post-increment operators. The increment operations are required to be equality-preserving,
 and the type is required to be \libconcept{equality_comparable}.
 \begin{note}
-This supersedes the annotations on the increment expressions
+This supersedes the ``not required to be equality-preserving'' comments
+on the increment expressions
 in the definition of \libconcept{weakly_incrementable}.
 \end{note}