[DNS] Create acme-challenge-txt-record

[ngayerie]

Case #01621522
PCX-18141

[github-actions]

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

Pattern	Owners
/src/content/docs/dns/	@RebeccaTamachiro, @cloudflare/pcx-technical-writing

[github-actions]

Preview URL: https://dacf1602.preview.developers.cloudflare.com
Preview Branch URL: https://ngayerie-patch-18.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/dns/manage-dns-records/troubleshooting/acme-challenge-txt-record/	https://ngayerie-patch-18.preview.developers.cloudflare.com/dns/manage-dns-records/troubleshooting/acme-challenge-txt-record/

[hyperlint-ai]

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PR Change Summary

Created a new troubleshooting document for unexpected _acme-challenge TXT records related to DNS management.

• Added a new section explaining unexpected _acme-challenge TXT records
• Provided causes for the automatic creation of these records
• Outlined solutions for managing and removing these records

Added Files

• src/content/docs/dns/manage-dns-records/troubleshooting/acme-challenge-txt-record.mdx

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