Add required-fields to changelog.d config (backport #9810) (#10005)

* changelog-d moved to codeberg

(cherry picked from commit 067967e2)

* Add required-fields to changelog.d config

(cherry picked from commit 5168b01c)

# Conflicts:
#	changelog.d/issue-8680
#	changelog.d/issue-9098-lexbraces
#	changelog.d/issue-9678
#	changelog.d/issue-9736
#	changelog.d/pkgconfig-once

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Co-authored-by: Francesco Gazzetta <fgaz@fgaz.me>
Co-authored-by: Artem Pelenitsyn <a.pelenitsyn@gmail.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>