chore: test WebTransport in Firefox interop tests again #3941

Job	Run time
Build	2m 43s
Test example js-libp2p-example-browser-pubsub	2m 13s
Test example js-libp2p-example-chat	1m 8s
Test example js-libp2p-example-circuit-relay	1m 30s
Test example js-libp2p-example-connection-encryption	1m 1s
Test example js-libp2p-example-custom-protocols	1m 1s
Test example js-libp2p-example-delegated-routing	2m 29s
Test example js-libp2p-example-discovery-mechanisms	1m 15s
Test example js-libp2p-example-peer-and-content-routing	1m 58s
Test example js-libp2p-example-pnet	1m 26s
Test example js-libp2p-example-protocol-and-stream-muxing	1m 27s
Test example js-libp2p-example-pubsub	1m 14s
Test example js-libp2p-example-transports	1m 31s
Test example js-libp2p-example-webrtc-private-to-private	1m 46s
	22m 42s

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