ci: allow fork PR checkout under pull_request_target #28

Job	Run time
Setup Variables	5s
Build with Nix / Nix [aarch64-linux]	6m 33s
Build with Nix / Nix [x86_64-linux]	7m 20s
Build Paper Draft / Build Paper Draft	38s
Run Checks / Build OpenAPI Documentation	19s
Run Checks / Run pre-commit	1m 23s
Run Checks / Check REUSE Compliance	15s
Prepare Docker Images / Prepare Docker Dev Images [fedora-minimal]	30s
Prepare Docker Images / Prepare Docker Dev Images [rocky9]	29s
Prepare Docker Images / Prepare Docker Dev Images [fedora-vscode]	7m 16s
Prepare Docker Images / Prepare Docker Dev Images [fedora]	37s
Prepare Docker Images / Prepare Docker Dev Images [ubuntu]	20s
Prepare Docker Images / Prepare Docker Dev Images [rocky]	7m 13s
Prepare Docker Images / Prepare Docker Dev Images [debian]	19s
Build from Source	0s
Build Docker Images	0s
Deploy Docker Images	0s
Run Tests	0s
All prerequisites completed	2s
Bundle Artifacts with Nix	0s
Deploy Nix Artifacts	0s
tag-minor-release	-1s
	33m 18s

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