chore: change tags, date, modified fields to comply with v2 of the Sigma spec.
chore: update the related type from `obsoletes` to `obsolete`.
chore: update local json schema to the latest version.
chore: update Microsoft references link to use the "learn" subdomain instead of "docs".
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Co-authored-by: nasbench <8741929+nasbench@users.noreply.github.com>
Thanks: @ryanplasma