gnucash maint: Put version back to 4.6

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/8e4c4948 (commit)
	from  https://github.com/Gnucash/gnucash/commit/3659c2a6 (commit)



commit 8e4c4948cc57e0fa83e3c71f0e7e4edf9ddd32ae
Author: John Ralls <jralls at ceridwen.us>
Date:   Tue Sep 14 08:28:49 2021 -0700

    Put version back to 4.6



Summary of changes:
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)