[Containers] Document SSH enabled by default

[gpanders]

Summary

Update docs (and add a changelog) to indicate new default value for containers SSH.

Documentation checklist

• Is there a changelog entry (guidelines)? If you don't add one for something awesome and new (however small) — how will our customers find out? Changelogs are automatically posted to RSS feeds, the Discord, and X.
• The change adheres to the documentation style guide.

[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/changelog/	@cloudflare/pm-changelogs, @cloudflare/pcx-technical-writing, @cloudflare/product-owners
/src/content/docs/containers/	@mikenomitch, @th0m, @cloudflare/pcx-technical-writing, @cloudflare/product-owners, @cloudflare/cloudchamber
/src/content/docs/workers/wrangler/	@cloudflare/wrangler, @irvinebroque, @cloudflare/pcx-technical-writing, @cloudflare/product-owners

[github-actions]

Preview URL: https://630af519.preview.developers.cloudflare.com
Preview Branch URL: https://ganders-cc-7638.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/changelog/post/2026-05-07-ssh-enabled-by-default/	https://ganders-cc-7638.preview.developers.cloudflare.com/changelog/post/2026-05-07-ssh-enabled-by-default/
https://developers.cloudflare.com/containers/ssh/	https://ganders-cc-7638.preview.developers.cloudflare.com/containers/ssh/
https://developers.cloudflare.com/workers/wrangler/configuration/	https://ganders-cc-7638.preview.developers.cloudflare.com/workers/wrangler/configuration/