feat(DiagCLI): Diagnostics CLI v.3.6.0 Release notes

[nr-linbaker]

Give us some context

• What problems does this PR solve?

Add release notes for latest Diagnostic CLI release v3.6.0: https://github.com/newrelic/newrelic-diagnostics-cli/releases/tag/v.3.6_0

[CLAassistant]

All committers have signed the CLA.

[github-actions]

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[CLAassistant]

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[tejaswaroop-nr]

Netlify build fork

[svc-docs-eng-opensource-bot]

✅ Your PR has been mirrored to our repository as PR #22062.
Commit: ff49aeb17ab0cb7d039f36fc9f29c5222b4742d1 (ff49aeb)
Our workflows will run in the mirrored PR linked above.
🚀 If the build is successful, a Netlify preview will be available shortly at: https://nr-linbaker-patch-1--docs-website-netlify.netlify.app

[tejaswaroop-nr]

Hi @nr-linbaker, I noticed you've created this PR to be merged directly into the main branch. This is usually not the case as it'll cause issues. Could you please create a PR to be merged into the develop branch? Thanks!