Update index.html

index.html

@@ -36,7 +36,7 @@ <h1>PSO2 Chat Log Statistics</h1>
 		</div>
 		<div>
 			<p>See the <a href="https://github.com/Elekester/PSO2-Chat-Log-Statistics/">GitHub Repository</a> for the user manual and the source code.</p>
-			<a href="javascript:void(0);" id="download" title="Click to download the output"><button type="button" id="download_button" disabled>Download the output as csv</button></a>
+			<a href="javascript:void(0);" id="download" title="Click to download the output"><button type="button" id="download_button" disabled>Download the output as a csv</button></a>
 		</div>
 		<div>
 			<h2>Output</h2>