update / correct the sw360 entry.

See merge request !13

Use SPDX ids for Creative Commons license

See merge request !12

LICENSE: Change to CC-BY-4.0

See merge request !11

Signed-off-by: Thomas Steenbergen <thomas.steenbergen@here.com>

The LICENSE file should reflect the license of the handbook [1] and
not the small bit of code used to build it.

[1]: https://gitlab.ow2.org/ggi/ggi-castalia/-/blob/fe344e32/handbook/content/10_introduction.md#L80



Signed-off-by: Thomas Steenbergen <thomas.steenbergen@here.com>

Improve some mentions of REUSE

See merge request ggi-castalia!10

Update nico

See merge request ggi/ggi-castalia!9