gnucash stable: Release GnuCash 5.12

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/eeedd7bf (commit)
	from  https://github.com/Gnucash/gnucash/commit/15c43d4a (commit)



commit eeedd7bfcb62ddefb4c45f140aa4760496ea7863
Author: John Ralls <jralls at ceridwen.us>
Date:   Sat Jun 28 14:31:20 2025 -0700

    Release GnuCash 5.12



Summary of changes:
 CMakeLists.txt |  2 +-
 NEWS           | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 90 insertions(+), 1 deletion(-)