Commit updates to "release-tools" repository:

• increase version number in "version" file to 19.12.3
• change "fromVersion=" in "create_log.py" file to v19.12.2 (previous stable)

Prepare repositories to be released:

• run ./increase_repos_version.sh in your local machine
• check CI for build errors at https://build.kde.org/job/Applications/view/Everything%20-%20stable-kf5-qt5/
• run ./add_appstream_versions.sh -s<GITSRC> --date 2020-03-05 in your local machine (expected release date)

Prepare tarballs:

• cleanup artifacts from old releases (sources/* and versions/*) for initial tarballs
• run update_l10n.sh in capona for initial tarballs
• run pack_all.sh in capona for initial tarballs, resp. pack.sh for each repo for respins
• run create_sources_inc > sources.inc in capona
• copy tars and and signatures to proper location in milonia
• copy versions/* to local machine, needed for tagging and create_log.sh
• run create_log.sh > log.inc in local machine
• commit log.inc as www/announcements/fulllog_releases-19.12.3.inc
• announce packages to release-team list, including changelog, hashes, and signature verification key

On release day:

• open download area in milona (chmod 755)
• commit sources.inc as www/info/source-releases-19.12.3.inc
• commit www/info/releases-19.12.3.php
• run tag_all.sh in your local machine
• run add_bugzilla_versions.sh in your local machine

Done by promo/www teams:

• publish release text from https://invent.kde.org/websites/kde-org-announcements-releases/tree/master/content/19.12.3
• commit announcements to www/announcements/index.php and www/index.php
• post announcement to announce at kde.org list, to reddit, etc.
• more?