Fix outdated comment

SSH transport seems to be supported now.

src/transport.c

@@ -89,8 +89,7 @@ static int transport_find_fn(
 	/* For other systems, perform the SSH check first, to avoid going to the
 	 * filesystem if it is not necessary */
 
-	/* It could be a SSH remote path. Check to see if there's a :
-	 * SSH is an unsupported transport mechanism in this version of libgit2 */
+	/* It could be a SSH remote path. Check to see if there's a : */
 	if (!definition && strrchr(url, ':')) {
 		// re-search transports again with ssh:// as url so that we can find a third party ssh transport
 		definition = transport_find_by_url("ssh://");