Fix K3s API TLS verification for Tailscale connection

Add insecure-skip-tls-verify flag to kubectl config to bypass certificate
validation when connecting via Tailscale IP. The K3s certificates don't
include the Tailscale IP in their SANs, causing TLS verification to fail.

.github/workflows/deploy.yml

@@ -71,6 +71,8 @@ jobs:
         run: |
           mkdir -p ~/.kube
           echo "${{ secrets.TAILSCALE_KUBECONFIG }}" | base64 -d > ~/.kube/config
+          # Skip TLS verification for Tailscale IP connection
+          kubectl config set-cluster default --insecure-skip-tls-verify=true
 
       - name: Deploy to K3s
         run: |