Update how-to-access-azureml-behind-firewall.md

[AhmadAbdullah91]

Adding info for port 5831 UDP protocol.

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[v-dirichards]

@s-polly

Can you review the proposed changes?

Important: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
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[v-dirichards]

@s-polly Could you review this proposed update to your article and enter #sign-off in a comment if it's ready to merge?

Thanks!

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[Copilot]

Pull Request Overview

This PR adds documentation for port 5831 UDP protocol to the Azure ML firewall access guide. The change provides additional network configuration information for users setting up Azure ML behind firewalls.

• Added documentation for port 5831 UDP protocol usage

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[Copilot]

[nitpick] The description for port 5831 should be more consistent with the other port descriptions in the table. Consider rephrasing to match the format of existing entries, such as 'VPN tunnel traffic over UDP (TLS encrypted)' or 'UDP VPN tunnel with TLS encryption'.

Suggested change

	| 5831 | It is a VPN tunnel over UDP, encrypted with TLS |
	| 5831 | VPN tunnel traffic over UDP (TLS encrypted) |