Test explicit overriding ajv dependency for moderate risk dependency

[aj-stein-nist]

Committer Notes

Test override fix on GHSA-8gh8-hqwg-xf34.

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[aj-stein-nist]

@david-waltermire-nist, here is the override patch as requested. It works with local commands from the init-validate-content.sh script so it seems to work without issue, as ajv-validator/ajv-cli#227 is blocked with other dependency and CI/CD issues in another PR, so it seems they know they can make a clean patch as well.