gnucash-htdocs master: Fix wrong previous version in 2.6.21 release announcement.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash-htdocs/commit/e1e1fdbc (commit)
	from  https://github.com/Gnucash/gnucash-htdocs/commit/363533c5 (commit)



commit e1e1fdbc3a72e63c6be0dbd4d985a8dcc4686cb6
Author: John Ralls <jralls at ceridwen.us>
Date:   Sat Jun 2 16:55:40 2018 -0700

    Fix wrong previous version in 2.6.21 release announcement.



Summary of changes:
 news/180410-2.6.21.news | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)