VPN: update to Tailscale v1.12.1
diff --git a/core/vpn/go.mod b/core/vpn/go.mod
index 2e00dbd..b3719c5 100644
--- a/core/vpn/go.mod
+++ b/core/vpn/go.mod
@@ -4,6 +4,7 @@
 
 require (
 	github.com/tailscale/wireguard-go v0.0.0-20210120212909-7ad8a0443bd3
-	inet.af/netaddr v0.0.0-20210105212526-648fbc18a69d
-	tailscale.com v1.4.5
+	golang.zx2c4.com/wireguard v0.0.0-20210624150102-15b24b6179e0
+	inet.af/netaddr v0.0.0-20210721214506-ce7a8ad02cc1
+	tailscale.com v1.12.1
 )