[range.adjacent.transform.iterator] Use "determine" for

`iterator_category`

Author: frederick-vs-ja

source/ranges.tex

@@ -13053,7 +13053,7 @@
 
 \pnum
 The member \grammarterm{typedef-name} \tcode{\exposid{iterator}::iterator_category}
-is defined as follows:
+is determined as follows:
 \begin{itemize}
 \item
 If \tcode{invoke_result_t<\exposid{maybe-const}<Const, F>\&,