Update native setup Sidekiq docs

[nihil2501]

Summary

• Update native setup Sidekiq docs
• Steps to reproduce: Follow this link in the docs and notice that it 404s: https://github.com/department-of-veterans-affairs/vets-api/blob/master/docs/setup/native.md?plain=1#L40
• Solution: Update to the correct link: https://github.com/department-of-veterans-affairs/va.gov-team-sensitive/blob/master/platform/engineering/sidekiq-enterprise-setup.md
• My team: VSO Fast Track Claims (we do not own the maintenance of these docs)
• Flipper: N/A

Related issue(s)

• Closes Native setup Sidekiq docs out of date #14693

Testing done

• Old behavior: Wrong / missing docs linked
• Verifying correctness: Follow the new link and see that it is correct
• Automated tests: N/A

What areas of the site does it impact?

N/A. Just docs.

Acceptance criteria

• I fixed|updated|added unit tests and integration tests for each feature (if applicable).
• No error nor warning in the console.
• Events are being sent to the appropriate logging solution
• Documentation has been updated (link to documentation)
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs
• Feature/bug has a monitor built into Datadog or Grafana (if applicable)
• If app impacted requires authentication, did you login to a local build and verify all authenticated routes work as expected
• I added a screenshot of the developed feature

[rmtolmach]

Thank you!!! Looks good.

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