gnucash maint: Fix typo blocking Windows build.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/db4417b2 (commit)
	from  https://github.com/Gnucash/gnucash/commit/7c323b22 (commit)



commit db4417b21282d7d3bb54eda05780d7eb62455b21
Author: John Ralls <jralls at ceridwen.us>
Date:   Thu Mar 25 07:40:42 2021 -0700

    Fix typo blocking Windows build.



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