gnucash-docs stable: Release Documentation for GnuCash 5.15

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/a64a81cc (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/ac6fe720 (commit)



commit a64a81cca24310a8b9f361d4a150d6b0945dfa10
Author: John Ralls <jralls at ceridwen.us>
Date:   Sat Mar 28 15:25:21 2026 -0700

    Release Documentation for GnuCash 5.15



Summary of changes:
 C/guide/index.docbook    | 13 ++++++++++++-
 C/manual/index.docbook   | 14 +++++++++++++-
 CMakeLists.txt           |  2 +-
 de/guide/index.docbook   | 13 ++++++++++++-
 de/manual/index.docbook  | 13 ++++++++++++-
 docbook/gnc-docbookx.dtd |  4 ++--
 it/guide/index.docbook   | 14 +++++++++++++-
 it/manual/index.docbook  | 14 +++++++++++++-
 ja/guide/index.docbook   | 14 +++++++++++++-
 pt/guide/index.docbook   | 14 +++++++++++++-
 pt/manual/index.docbook  | 14 +++++++++++++-
 zh/guide/index.docbook   | 11 ++++++++++-
 12 files changed, 127 insertions(+), 13 deletions(-)