Fix Magic DNS issue: Enable DNS acceptance in Windows installation scripts

Changed --accept-dns=false to --accept-dns=true in both:
- farmq-install-en.ps1
- farmq-install.ps1

This allows Windows clients to receive Headscale Magic DNS configuration
(100.64.0.1) automatically during installation, enabling proper name resolution
for *.headscale.local domains.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

farmq-install-en.ps1

@@ -258,7 +258,7 @@ function Register-Headscale {
             "--login-server=$HeadscaleServer",
             "--authkey=$PreAuthKey",
             "--accept-routes",
-            "--accept-dns=false"
+            "--accept-dns=true"
         )
         
         & $tailscalePath $arguments

farmq-install.ps1

@@ -264,7 +264,7 @@ function Register-Headscale {
             "--login-server=$HeadscaleServer",
             "--authkey=$PreAuthKey",
             "--accept-routes",
-            "--accept-dns=false"
+            "--accept-dns=true"
         )
         
         & $tailscalePath $arguments