woff2tags.h: Fix copyright year.
diff --git a/src/sfnt/woff2tags.h b/src/sfnt/woff2tags.h
index a312483..d0d28ae 100644
--- a/src/sfnt/woff2tags.h
+++ b/src/sfnt/woff2tags.h
@@ -4,7 +4,7 @@
*
* WOFFF2 Font table tags (specification).
*
- * Copyright (C) 1996-2020 by
+ * Copyright (C) 2019-2020 by
* Nikhil Ramakrishnan, David Turner, Robert Wilhelm, and Werner Lemberg.
*
* This file is part of the FreeType project, and may only be used,