Update revisions.tex

Remove double word "use have"

chapters/revisions.tex

@@ -269,7 +269,7 @@ \subsection{Main changes in Modelica 3.5}\label{main-changes-in-modelica-3-5}
 
 \item Improved stream connector formulation, \cref{derivation-of-stream-equations}
 \begin{itemize}
-\item Updated notation to use have mass-flows as derivatives, \cref{derivation-of-stream-equations}.
+\item Updated notation to use mass-flows as derivatives, \cref{derivation-of-stream-equations}.
 Ticket \href{https://github.com/modelica/ModelicaSpecification/issues/2644}{\#2644}.
 \item Further clarify inStream simplifications, \cref{connection-of-3-stream-connectors-where-one-mass-flow-rate-is-identical-to-zero-n-3-and}.
 Ticket \href{https://github.com/modelica/ModelicaSpecification/issues/2242}{\#2242}.