Update baseline catalog revision to the previous 1.2.0 oscal content release

[david-waltermire]

Committer Notes

The PR updates the FedRAMP baselines to point to the prior OSCAL v1.2.0 content release. This revision still has the expected label properties. These will be used in the interim to avoid breakage, while PR #540 is reviewed by the FedRAMP stakeholder community.

All Submissions:

• [x] Have you selected the correct base branch per Contributing guidance?
• [x] Have you set "Allow edits and access to secrets by maintainers"?
• [x] Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• [x] Have you squashed any non-relevant commits and commit messages? [instructions]
• [x] Have you added an explanation of what your changes do and why you'd like us to include them?
• [ ] If applicable, have all FedRAMP Documents Related to OSCAL Adoption affected by the changes in this issue have been updated.?
• [ ] If applicable, does this PR reference the issue it addresses and explain how it addresses the issue?

By submitting a pull request, you are agreeing to provide this contribution under the CC0 1.0 Universal public domain dedication.

[rpalmer-gsa]

Concur with merging to avoid backwards compatibility breaking changes identified in OSCAL content release 1.2.1.