Socket.io test is flakey

[pieh]

The test "socket-io -> should support socket.io without falling back to polling" often (but not always) fails when running tests, but seems to work fine when testing manually.

Data

The following is parsed automatically by the Next.js repo e2e test report generator.

test: test/e2e/socket-io/index.test.js
reason: Socket.io test is flakey