OpenSSF Documentation Updates

[GeauxJD]

These suggestions are based on a review of this project's repositories against a checklist of common items done by other OpenSSF projects for consistency and best practices:

• Consider adding a Security Policy to the repos, like this example.
• Consider adding a CONTRIBUTING.md file to the repository like this example.
• Consider adding information about the OpenVEX community meeting, slack channel etc to the repos like this example.

[juncas2205-debug]

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