Update chapters/synchronous.tex

Co-authored-by: Henrik Tidefelt <henrikt@wolfram.com>

chapters/synchronous.tex

@@ -238,7 +238,7 @@ \subsection{Argument Restrictions (Component Expression)}\label{argument-restric
 The reason for restricting an input argument to be a component expression is that the start value of the input argument is returned before the first tick of the clock of the input argument and this
 is not possible for a general expression.
 
-The reason for restricting an input argument to be a evaluable expression is that the value of the input argument needs to be evaluated during translation, in order that clock analysis can be performed during translation.
+The reason for restricting an input argument to be an evaluable expression is that the value of the input argument needs to be evaluated during translation, in order that clock analysis can be performed during translation.
 In some cases there is a special handling of parameter expressions, which indicates that their values are not needed during translation.
 \end{nonnormative}