IVGCVSW-7255 Update Doxygen Project Version

Signed-off-by: Cathal Corbett <cathal.corbett@arm.com>
Change-Id: I344f940e161b533963f8864196842feba9be2cae
diff --git a/docs/Doxyfile b/docs/Doxyfile
index 9a7c957..863712b 100644
--- a/docs/Doxyfile
+++ b/docs/Doxyfile
@@ -1,6 +1,6 @@
 # Doxyfile 1.8.12
 
-# Copyright (c) 2020 ARM Limited.
+# Copyright (c) 2018, 2020-2023 ARM Ltd and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: MIT
 #
@@ -61,7 +61,7 @@
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 22.11
+PROJECT_NUMBER         = 23.02
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a