gnucash stable: [fin.c] fix encoding to utf8

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/a545c4f3 (commit)
	from  https://github.com/Gnucash/gnucash/commit/e753555c (commit)



commit a545c4f396081b3274aec515bdf998ce34c6d53e
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Sat Sep 20 21:51:51 2025 +0800

    [fin.c] fix encoding to utf8



Summary of changes:
 libgnucash/app-utils/calculation/fin.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)