clarify Simultaneous open connections for workers

[vicb]

Summary

It could be surprising for users to get a "Response closed due to connection limit" exception while the docs says that requests beside the max 6 connections are queue.

This PR adds some details and the exception message.

Screenshots (optional)

Documentation checklist

• The documentation style guide has been adhered to.

[hyperlint-ai]

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PR Change Summary

Clarified the behavior of simultaneous open connections for workers and added details regarding connection limits and exceptions.

• Added details about the 'Response closed due to connection limit' exception.
• Clarified what constitutes a stalled connection.
• Provided code examples to illustrate connection behavior.

Modified Files

• src/content/docs/workers/platform/limits.mdx

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[github-actions]

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

Pattern	Owners
/src/content/docs/workers/	@cloudflare/workers-docs, @GregBrimble, @irvinebroque, @mikenomitch, @korinne, @WalshyDev, @cloudflare/deploy-config, @cloudflare/pcx-technical-writing, @kodster28, @cloudflare/wrangler, @cloudflare/workers-runtime-1, @cloudflare/wrangler

[github-actions]

Preview URL: https://bc55b473.preview.developers.cloudflare.com
Preview Branch URL: https://vicb-workers-con.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/workers/platform/limits/	https://vicb-workers-con.preview.developers.cloudflare.com/workers/platform/limits/

[vicb]

Thanks James and Harris 🙏