Update dependency jsonschema to v4.21.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
jsonschema (changelog)	==4.20.0 -> ==4.21.1

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Release Notes

python-jsonschema/jsonschema (jsonschema)

v4.21.1

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• Slightly speed up the contains keyword by removing some unnecessary validator (re-)creation.

v4.21.0

Compare Source

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• Fix the behavior of enum in the presence of 0 or 1 to properly consider True and False unequal (#​1208).
• Special case the error message for {min,max}{Items,Length,Properties} when they're checking for emptiness rather than true length.

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