gnucash-docs maint: Add ghelp to the default target

[Geert Janssens]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/2d3da429 (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/273f7d3f (commit)



commit 2d3da429263f4154698033e11a90023b791ea87a
Author: Geert Janssens <geert at kobaltwit.be>
Date:   Sun Oct 3 20:14:04 2021 +0200

    Add ghelp to the default target
    
    At some point in the past ghelp didn't have to be built, as one
    could develop and test simply from the source directory. That is
    no longer the case so perform a build by default if ghelp
    is enabled.



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