[intro.races] Rephrase note to avoid awkward "can not".

tkoeppe · tkoeppe · commit dd306a57cdcc · 2024-07-27T00:11:08.000+01:00
Suggested by ISO/CS.
diff --git a/source/basic.tex b/source/basic.tex
@@ -6537,8 +6537,8 @@
 
 \pnum
 \begin{note}
-Transformations that introduce a speculative read of a potentially
-shared memory location might not preserve the semantics of the \Cpp{} program as
+It is possible that transformations that introduce a speculative read of a potentially
+shared memory location do not preserve the semantics of the \Cpp{} program as
 defined in this document, since they potentially introduce a data race. However,
 they are typically valid in the context of an optimizing compiler that targets a
 specific machine with well-defined semantics for data races. They would be
