Realtime: added warning about port 53 URLs

[nils-ohlmeier]

Summary

If users take directly the output from the TURN credentials endpoint call and don't utilize trickle ICE they have to wait for a 40 second timeout.
This PR adds a warning regarding this know problem and how to prevent it.

Documentation checklist

• The documentation style guide has been adhered to.

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PR Change Summary

Added a warning about the use of port 53 URLs in the TURN credentials documentation to prevent timeout issues for users not utilizing trickle ICE.

• Introduced a warning regarding the use of alternate port 53 URLs in TURN credentials.
• Clarified that using trickle ICE mitigates timeout issues with port 53.
• Recommended filtering out port 53 URLs to avoid waiting for timeouts.

Modified Files

• src/content/docs/realtime/turn/generate-credentials.mdx

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[github-actions]

Preview URL: https://fee0dfa5.preview.developers.cloudflare.com
Preview Branch URL: https://add-turn-53-warning.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/realtime/turn/generate-credentials/	https://add-turn-53-warning.preview.developers.cloudflare.com/realtime/turn/generate-credentials/