Retry failing helix test

`Http2WebSocketTests.HEADERS_Received_SecondRequest_ConnectProtocolReset` failed in #48664

Author: amcasey

eng/test-configuration.json

@@ -18,6 +18,7 @@
     {"testName": {"contains": "POST_ServerAbortAfterWrite_ClientReceivesAbort"}},
     {"testName": {"contains": "ServerReset_BeforeRequestBody_ClientBodyThrows"}},
     {"testName": {"contains": "InjectedStartup_DefaultApplicationNameIsEntryAssembly"}},
+    {"testName": {"contains": "HEADERS_Received_SecondRequest_ConnectProtocolReset"}},
     {"testAssembly": {"contains": "IIS"}},
     {"testAssembly": {"contains": "Template"}},
     {"failureMessage": {"contains":"(Site is started but no worker process found)"}},