chore: update copyright notice year (#16)

Author: Jefffrey

NOTICE.txt

@@ -1,5 +1,5 @@
 Apache DataFusion
-Copyright 2019-2024 The Apache Software Foundation
+Copyright 2019-2026 The Apache Software Foundation
 
 This product includes software developed at
-The Apache Software Foundation (http://www.apache.org/).
+The Apache Software Foundation (http://www.apache.org/).