Update websocket relay example app #1146

Job	Run time
changes	3s
run-checks (ubuntu-latest, stable)	2m 44s
run-deny	1m 28s
run-checks (ubuntu-latest, nightly)	2m 43s
run-tests-windows (stable, all)	18m 8s
run-checks (macos-latest, stable)	4m 34s
run-tests-windows (stable, none)	14m 39s
run-tests (ubuntu-latest, stable, all)	10m 29s
run-checks (macos-latest, nightly)	4m 1s
run-tests-windows (nightly, all)	22m 29s
run-tests (ubuntu-latest, stable, none)	7m 9s
run-checks (windows-latest, stable)	5m 55s
run-tests-windows (nightly, none)	12m 42s
run-tests (ubuntu-latest, nightly, all)	10m 15s
run-checks (windows-latest, nightly)	6m 13s
run-tests (ubuntu-latest, nightly, none)	7m 11s
run-docs	3m 43s
run-tests (macos-latest, stable, all)	28m 2s
run-tests (macos-latest, stable, none)	19m 44s
run-tests (macos-latest, nightly, all)	16m 41s
run-tests (macos-latest, nightly, none)	12m 51s
	3h 31m 44s

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