Update year

license.html

@@ -196,7 +196,7 @@
 
   <div class="section" id="nagare-license">
 <h1>Nagare license<a class="headerlink" href="#nagare-license" title="Permalink to this headline">¶</a></h1>
-<p>Copyright (c) 2008-2018, Net-ng.
+<p>Copyright (c) 2008-2022, Net-ng.
 All rights reserved.</p>
 <p>Redistribution and use in source and binary forms, with or without modification,
 are permitted provided that the following conditions are met:</p>
@@ -289,4 +289,4 @@ <h1>Nagare license<a class="headerlink" href="#nagare-license" title="Permalink
 
 
 </body>
-</html>
+</html>