Changelog for v1.15.0-rc1 (#16422)

Changelog for v1.15.0-rc1 (#16422)

* changelog -m 1.15.0 generate

* enhance changelog

* Apply suggestions from code review

* Apply suggestions from code review

Co-authored-by: techknowlogick <matti@mdranta.net>
* move SECURITY before FEATURES

* move ENHANCEMENTS above BUGFIXES

* as per techknowlogick

* more

* node16

* Apply suggestions from code review

Co-authored-by: Kyle D. <kdumontnu@gmail.com>
* next

* Apply suggestions from code review

* Update CHANGELOG.md

Co-authored-by: Norwin <noerw@users.noreply.github.com>
* Update CHANGELOG.md

Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: techknowlogick <matti@mdranta.net>
Co-authored-by: Kyle D. <kdumontnu@gmail.com>
Co-authored-by: Norwin <noerw@users.noreply.github.com>
Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>