[re.regiter.incr] Replace the uses of "local variable"

... with "variable with automatic storage duration"

Author: frederick-vs-ja

source/text.tex

@@ -12390,7 +12390,8 @@
 \begin{itemdescr}
 \pnum
 \effects
-Constructs a local variable \tcode{start} of type \tcode{BidirectionalIterator} and
+Constructs a variable \tcode{start} of type \tcode{BidirectionalIterator}
+with automatic storage duration and
 initializes it with the value of \tcode{match[0].second}.
 
 \pnum