fix: update deprecated agent_os imports to agent_governance in README

[fazalpsinfo-cmyk]

Description

Updates the README quick-start import from deprecated agent_os to agent_governance per the package consolidation migration guide.

Refs #3253

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Welcome, and thank you for your contribution! Great job identifying and updating the deprecated import in the README.

Before merging, please:

• Remove the "Support my work" link from the pull request body, as it doesn't align with the repository's contribution guidelines.

For more details, see CONTRIBUTING.md. Let us know if you need any help!

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Test coverage looks good. No gaps identified.

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No security issues found.

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No breaking changes detected.

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Docs Sync

• README.md -- section referencing agent_os needs update to reflect the change to agent_governance.

Documentation is not fully in sync.

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No issues found. Clean change.

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PR Review Summary

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Verdict: ⚠️ AI review incomplete; ready for human review

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🔴 Contributor Check: HIGH

Check	Result
Profile	HIGH
Credential	LOW
Overall	HIGH

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[imran-siddique]

Correct fix. This updates the README import from the deprecated agent_os.policies to agent_governance.policies, matching the current module layout. LGTM.