IVGCVSW-4801: Updating Doxygen project version for 20.05 release.

Signed-off-by: Colm Donelan <Colm.Donelan@arm.com>
Change-Id: I408a10610a5a91de4608b2597918445fcb5ee21c
diff --git a/docs/Doxyfile b/docs/Doxyfile
index 67a8eeb..6f4e3b0 100644
--- a/docs/Doxyfile
+++ b/docs/Doxyfile
@@ -61,7 +61,7 @@
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 20.02
+PROJECT_NUMBER         = 20.05
 
 # 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