DOCS-2804: Publish Calico Enterprise 3.21.6

[ctauchen]

Product Version(s):

Issue:

Link to docs preview:

SME review:

• An SME has approved this change.

DOCS review:

• A member of the docs team has approved this change.

Additional information:

Merge checklist:

• Deploy preview inspected wherever changes were made
• Build completed successfully
• Test have passed

[netlify]

✅ Deploy Preview for calico-docs-preview-next ready!

Name	Link
🔨 Latest commit	65fb043
🔍 Latest deploy log	https://app.netlify.com/projects/calico-docs-preview-next/deploys/697a2d683f9c9700087f0040
😎 Deploy Preview	https://deploy-preview-2491--calico-docs-preview-next.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[netlify]

✅ Deploy Preview succeeded!

Name	Link
🔨 Latest commit	65fb043
🔍 Latest deploy log	https://app.netlify.com/projects/tigera/deploys/697a2d689d58df00085effe8
😎 Deploy Preview	https://deploy-preview-2491--tigera.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 70 (🟢 up 2 from production) Accessibility: 98 (no change from production) Best Practices: 92 (no change from production) SEO: 100 (no change from production) PWA: - View the detailed breakdown and full score reports

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[Copilot]

Pull request overview

This PR publishes Calico Enterprise 3.21.6, a bug fix/hotfix release. It updates version references from 3.21.5 to 3.21.6 across the versioned documentation directory for the 3.21-2 release branch.

Changes:

• Updates version strings in variables.js (releaseTitle, filesUrl, chart_version_name)
• Adds new v3.21.6 release entry to releases.json with all component versions
• Adds release notes section for version 3.21.6

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
calico-enterprise_versioned_docs/version-3.21-2/variables.js	Updates version references from 3.21.5 to 3.21.6 in three locations
calico-enterprise_versioned_docs/version-3.21-2/releases.json	Adds complete v3.21.6 release entry with all component versions at the beginning of the array
calico-enterprise_versioned_docs/version-3.21-2/release-notes/index.mdx	Adds new release notes section for 3.21.6 with date and bug fixes placeholder

[Copilot]

The bug fixes section contains only "TBD" (To Be Determined) as placeholder text. Release notes should contain actual bug fix descriptions before publishing. This placeholder content should be replaced with the actual list of bugs fixed in this release, or if no bug fixes are included, the section should be clarified accordingly.

Suggested change

	* TBD
	* This release does not include additional user-visible bug fixes; it contains only internal improvements.