Fix Example SSP to Pass Tests

[Gabeblis]

Committer Notes

Purpose

This PR aims to fix our example ssp (fedramp-ssp-example.oscal.xml) as there are two errors that cause the control-implementation-status constraint to fail. This error was caused by merging PR's, that passed all the GHA, in rapid succession and tests were not rerun after one PR was merged, resulting in erroneous content being added in the following PR.

Changes

• Changed all occurrences implementation status state "operational" to "implemented" in order to align with the allowed values.

All Submissions:

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  - [ ] If applicable, have all FedRAMP Documents Related to OSCAL Adoption affected by the changes in this issue have been updated.? Not applicable.
• If applicable, does this PR reference the issue it addresses and explain how it addresses the issue?

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[aj-stein-gsa]

Ironically, I had not completed a review before merge on this very change because I was too slow to match you all. Nice catch.