Describe the bug
The license reported by the mod does not match the actual license in use (as far as I can see).
Currently the license is reported as GNU.

Latest.log
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To Reproduce
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Expected behavior

I would expect the mod to adhere to the SPDX standards in the following places, considering that "GNU" is neither correct nor sufficient to determine the license (more info in the additional context section):

Screenshots

Additional context

The LICENSE file at time of writing seems¹ to be GPL-3.0-only (referred to using the SPDX license identifier).

SPDX license identifiers are recommended by fabric for its metadata for instance:

To aid automated tools, it is recommended to use SPDX License Identifiers for open-source licenses.

¹: the author(s) should verify that GPL 3.0 only is the correct license, as opposed to GPL 3.0 or-later for instance

That copy pasta is present in several other mods, thanks for reporting.