Add note about DNS forwarder port change

[hakansa]

Add note about DNS forwarder port change

[Copilot]

Pull Request Overview

This PR adds documentation about a DNS forwarder port change in NetBird v0.59.0. The change moves the local DNS forwarder from port 5353 to port 22054 to avoid collisions on client devices.

• Adds informational notes about the DNS forwarder port change in NetBird v0.59.0
• Documents backward compatibility behavior for mixed-version environments

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/pages/how-to/routing-traffic-to-private-networks.mdx	Adds note about DNS forwarder port change for routed DNS routes
src/pages/how-to/manage-dns-in-your-network.mdx	Adds note about DNS forwarder port change for general DNS management

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[mlsmaycon]

Let's also add the same note in:

/how-to/networks#enable-dns-wildcard-routing
/how-to/accessing-entire-domains-within-networks#enabling-dns-wildcard-routing

[hakansa]

Let's also add the same note in:

/how-to/networks#enable-dns-wildcard-routing /how-to/accessing-entire-domains-within-networks#enabling-dns-wildcard-routing

done.