router03: fix leakage of MWAN traffic

When traffic is coming in, i.e. `To = 45.13.104.25/29`, we were immediately redirecting
it to `swp`, i.e. ENS.

By saying that `To` should also consult the MWAN routing table, we are eliminating
the redirection.

machines/router03/router.nix

@@ -168,6 +168,12 @@ in
                 Table = "mwan";
               };
             }
+            {
+              routingPolicyRuleConfig = {
+                To = "45.13.104.25/29";
+                Table = "mwan";
+              };
+            }
           ];
         };
         "20-tun-he" = {