[DOCS] update release calendar

[Dana Bauer (danabauer)]

What's in this PR?

• updates to release calendar and links
• closes update release calendar page #351

[github-actions]

Super-linter summary

Language	Validation result
JAVASCRIPT_ES	Pass ✅
MARKDOWN	Pass ✅
NATURAL_LANGUAGE	Pass ✅
SQLFLUFF	Pass ✅

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🗺️ OMF Docs previews are live!

🆕 Auto-gen schema site (beta)	https://staging.overturemaps.org/docs/pr/352/index.html
🗂️ Auto-gen schema ref	dev@04f8969
🌍 Repo schema site	https://staging.overturemaps.org/docs/pr/352-no-autogen/index.html
🕐 Updated	Apr 17, 2026 12:20 UTC
📝 Commit	c7fcecf

Auto-gen schema site is now available. This is an early preview of a future workflow where we will automatically generate and publish reference docs for the Overture Maps Format schema with every change to the schema repo.
The auto-gen schema site may contain incomplete or inaccurate information as we are still refining the generation process, so please compare against the repo schema site and refer to the linked commit for the most up-to-date source of truth.

Note

♻️ This preview updates automatically with each push to this PR.