Delete the redundant 'update' when describing actions upon independent memory locations. The definition of 'access' includes modifying a location per 1.3.1/access.

Author: faisalv

source/intro.tex

@@ -482,7 +482,7 @@
 features of the language, such as references and virtual functions, might
 involve additional memory locations that are not accessible to programs but are
 managed by the implementation. \exitnote Two or more threads of
-execution~(\ref{intro.multithread}) can update and access separate memory
+execution~(\ref{intro.multithread}) can access separate memory
 locations without interfering with each other.
 
 \pnum