[lex.ccon] Clarify antecedent for 'it'

Author: jensmaurer

source/lex.tex

@@ -1366,7 +1366,7 @@
 for non-encodable ordinary and wide character literals assume that
 the specified character lacks representation in
 the ordinary literal encoding or wide literal encoding, respectively, or
-that encoding it would require more than one code unit.
+that encoding the character would require more than one code unit.
 \end{note}
 
 \begin{floattable}{Character literals}{lex.ccon.literal}