[MWAN] Added note about cloudflared

[marciocloudflare]

Summary

Closes PCX-16505

Documentation checklist

• The documentation style guide has been adhered to.

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PR Change Summary

Added a caution note regarding the limitations of DHCP relay when using Cloudflare Tunnel.

• Included a caution note stating that DHCP relay will not work if the DHCP server is behind a Cloudflare Tunnel.
• Specified that a Magic WAN tunnel or CNI connection is required for DHCP relay to function.

Modified Files

• src/content/docs/magic-wan/configuration/connector/network-options/dhcp/dhcp-relay.mdx

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[github-actions]

Preview URL: https://32174c9c.preview.developers.cloudflare.com
Preview Branch URL: https://marcio-pcx16505-mconn-cloudflared.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/magic-wan/configuration/connector/network-options/dhcp/dhcp-relay/	https://marcio-pcx16505-mconn-cloudflared.preview.developers.cloudflare.com/magic-wan/configuration/connector/network-options/dhcp/dhcp-relay/