License of jsonschema fork in v1 branch?

[musicinmybrain]

CloudFormation Lint Version

cfn-lint 1.2.0.a1

What operating system are you using?

Fedora Linux

Describe the bug

Given that most of the code in src/cfnlint/jsonschema in the v1 branch is derived from https://github.com/python-jsonschema/jsonschema, which is available under a standard MIT license, can these files really be said to be available under the overall MIT-0 license? The MIT license has attribution requirements (“The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.”) that don’t seem to be respected here.

cfn-lint/src/cfnlint/jsonschema/_filter.py

Line 3 in bf0e098

SPDX-License-Identifier: MIT-0

cfn-lint/src/cfnlint/jsonschema/_filter.py

Lines 7 to 8 in bf0e098

	# Code is taken from jsonschema package and adapted CloudFormation use
	# https://github.com/python-jsonschema/jsonschema

Expected behavior

The attribution requirements of the original jsonschema license are respected, or if its authors agreed to make it available under MIT-0 for use in cfn-lint, this is clearly indicated.

Reproduction template

N/A