Fix date format in revision history.

Author: chrmatt

algpseudocodex.tex

@@ -763,7 +763,7 @@ \subsection{Changing Keywords}
 
 \section{Revision History}
 
-\subsection*{v1.2.0 (2025-16-04)}
+\subsection*{v1.2.0 (2025-04-16)}
 \begin{itemize}
  \item Added support for classes, structures, properties, and methods.
 \end{itemize}