[2.0] docs: remove the word "BOM"

CycloneDX is no longer BOM-only.
lets remove if from all the docs

still using "BOM"
- https://github.com/CycloneDX/specification/blob/a1c8aeb2e4e6a72851fd937f210e9b5add1cf514/schema/2.0/cyclonedx-2.0.schema.json#L34-L37
- to be continued

Start with the CycloneDX 2.0 schema at the linked lines, then search the repository documentation for remaining uses of "BOM". Review each occurrence in context and remove or update wording that assumes CycloneDX is BOM-only; done means the documented terminology matches the broader scope, including the schema reference.

Written by the indexing model from the issue text.