Fix typo

implementation/ethernet-lidar.tex

@@ -94,7 +94,7 @@ The syntax for requesting data is as follows:
 
 \texttt{zzzz} is a the starting step, valid values are $0 \le zzzz \le 1079$ 
 
-\texttt{yyyy} is a the ending step, valid values are $1 \le zzzz \le 1080$ 
+\texttt{yyyy} is a the ending step, valid values are $1 \le yyyy \le 1080$ 
 
 \texttt{zzzz} may not be greater than \texttt{yyyy}.