License issue GPL dependency rfc3987

[kdekker-kdr4]

cyclonedx-python (cyclonedx-bom==4.1.2) depends via cyclonedx-python-lib[validation]==6.4.3 on the package jsonschema, but with the special option format (jsonschema[format]).
This introduces the GPL dependency of package rfc3987, which I think is not the intention.

How to reproduce:

• Install Python 3.10.11
• In cmd call: pip install cyclonedx-bom

Prove:

Temporary user solution:

Downgrade cyclonedx-bom to a version without the dependency such as 3.11.7.

[jkowalleck]

duplicates the original CycloneDX/cyclonedx-python-lib#568