Add disclaimer

main.tex

@@ -12,6 +12,12 @@
 
 \maketitle
 
+\begin{center}
+    \textbf{Note}: This is a reconstruction of the exam in February 2023. Maybe questions weren't asked exactly like this, but they capture the general sense. Overall, it was very similar to older exams.
+\end{center}
+
+\vspace*{1cm}
+
 \begin{questions}
 \question State if the following are true or false
 \begin{parts}