fix(docs): update broken doc links

[bpg-dev]

What does this PR do?

Contributor's Note

• I have run make lint and fixed any issues.
• I have updated documentation (FWK: schema descriptions + make docs; SDK: manual /docs/ edits).
• I have added / updated acceptance tests (required for new resources and bug fixes — see ADR-006).
• I have considered backward compatibility (no breaking schema changes without ! in PR title).
• For new resources: I followed the reference examples.
• I have run make example to verify the change works (mainly for SDK / provider config changes).

Proof of Work

Community Note

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Closes #0000 | Relates #0000

[gemini-code-assist]

Code Review

This pull request updates the security reporting instructions in SECURITY.md and corrects deprecation notices across documentation and templates for the virtual_environment_vm2 resource and data source, redirecting users to proxmox_vm. Feedback was provided to refine the security reporting steps by using the button label "Report a vulnerability" to ensure accuracy for external reporters.