res: Replace image that is incompatible with DFSG
CC-BY-2.0 is not compatible with DFSG https://wiki.debian.org/DFSGLicenses
The new image is CC-BY-SA-4.0.
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CC-BY-2.0 is not compatible with DFSG https://wiki.debian.org/DFSGLicenses
The new image is CC-BY-SA-4.0.