Fixed macro typo

NEWPROPOSAL/preamble.tex

@@ -274,7 +274,7 @@
 
 \newcommand{\zx}{\textsc{zx}\xspace}
 \newcommand{\zxcalculus}{\textsc{zx}-calculus\xspace}
-\newcommand{\azx}{\texttt{\bfseries\color{red!70!black}[do you mean \textbackslash DZXC?]}\xspace}
+\newcommand{\azx}{\texttt{\bfseries\color{red!70!black}[do you mean \textbackslash dzxc?]}\xspace}
 \newcommand{\liquid}{\texttt{\bfseries\color{red!70!black}[do you mean \textbackslash Qsharp?]}\xspace}
 \newcommand{\Qsharp}{Q\texttt\#\xspace}
 \newcommand{\dzxc}{\texttt{DXZC}\xspace}