Backport #28227 by @denyskon
When creating a pull request, allow directly assigning it to a project,
as it is already possible for issues.
After:

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Co-authored-by: Denys Konovalov <kontakt@denyskon.de>
Co-authored-by: delvh <dev.lh@web.de>
(cherry picked from commit
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.. | ||
api | ||
common | ||
install | ||
private | ||
utils | ||
web | ||
init.go |