[range.prim.data] Use ranges::begin(t) not ranges::begin(E)

This is consistent with the typo fixes for ranges::size done in
aa9c660 as part of #3752.

Author: jwakely

source/ranges.tex

@@ -925,7 +925,7 @@
   is a valid expression whose type models
   \libconcept{contiguous_iterator},
   \tcode{ranges::data(E)} is expression-equivalent to
-  \tcode{to_address(ranges::begin(E))}.
+  \tcode{to_address(ranges::begin(t))}.
 
 \item
   Otherwise, \tcode{ranges::data(E)} is ill-formed.