[SYCL][Doc] Update extension template copyright year (#16518)

2025! Happy new year! 🎆

Signed-off-by: Larsen, Steffen <steffen.larsen@intel.com>

Author: steffenlarsen

sycl/doc/extensions/template.asciidoc

@@ -21,7 +21,7 @@
 == Notice
 
 [%hardbreaks]
-Copyright (C) 2024 Intel Corporation.  All rights reserved.
+Copyright (C) 2025 Intel Corporation.  All rights reserved.
 
 Khronos(R) is a registered trademark and SYCL(TM) and SPIR(TM) are trademarks
 of The Khronos Group Inc.  OpenCL(TM) is a trademark of Apple Inc. used by