fix: use absolute path

Signed-off-by: Nikos Pitsillos <npitsillos@gmail.com>

tests/e2e/tailscale/Vagrantfile

@@ -54,8 +54,8 @@ def provision(vm, roles, role_num, node_num)
     else
       vpn_auth_method = "vpn-auth-file"
       File.write("./vpn-auth-file", auth_info)
-      vm.provision "file", source: "./vpn-auth-file", destination: "$HOME/vpn-auth-file"
-      vpn_auth = File.expand_path("$HOME/vpn-auth-file")
+      vm.provision "file", source: "./vpn-auth-file", destination: "/home/vagrant/vpn-auth-file"
+      vpn_auth = "/home/vagrant/vpn-auth-file"
     end
     vm.provision :k3s, run: 'once' do |k3s|
       k3s.config_mode = '0644' # side-step https://github.com/k3s-io/k3s/issues/4321