[fold] Explictly disable the feature in temDISABLED test

src/test/app/XChain_test.cpp

@@ -532,7 +532,7 @@ struct XChain_test : public beast::unit_test::suite,
  // coverage test: BridgeCreate::preflight() - create bridge when feature
  // disabled.
  {
- Env env(*this);
+ Env env(*this, supported_amendments() - featureXChainBridge);
  env(create_bridge(Account::master, jvb), ter(temDISABLED));
  }