core: fix DNS configuration type for wireguard connections
The DNS configuration for a wireguard connection should be added with type "VPN".
Fixes: 58287cbc ('core: rework IP configuration in NetworkManager using layer 3 configuration')
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The DNS configuration for a wireguard connection should be added with type "VPN".
Fixes: 58287cbc ('core: rework IP configuration in NetworkManager using layer 3 configuration')