Fix typo in css

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

cgit.css

@@ -98,7 +98,7 @@ div#logo {
 }
 
 div#sidebar div.infobox {
-	margin: 0px 0px 0pax 0px;
+	margin: 0px 0px 0px 0px;
 	padding: 0.5em;
 	text-align: left;
 	background-color: #ccc;