fix json-schema-file strict schema property

[jkowalleck]

Hello @stevespringett ,

looks like there is a bug in the strict schema files: the optional bom.$schema property was not updated, when the actual schema $id revision was bumped.

to mitigate this for now and the future, i propose to lax the definition - from a specific string to any string. This means: no need to modify the schema version on multiple places, when bumping.

[stevespringett]

Will need to take a vote. Another possibility would be to leave the enum in place and have a unit test that checks.

[jkowalleck]

updated for CDX 1.5

[jkowalleck]

obsoleted by https://github.com/CycloneDX/specification/issues/402