fix: use unknown promise type #5002

Job	Run time
Build	2m 56s
Test example js-libp2p-example-browser-pubsub	1m 58s
Test example js-libp2p-example-custom-protocols	1m 10s
Test example js-libp2p-example-delegated-routing	2m 25s
Test example js-libp2p-example-peer-and-content-routing	1m 16s
Test example js-libp2p-example-protocol-and-stream-muxing	1m 12s
Test example js-libp2p-example-chat	1m 39s
Test example js-libp2p-example-connection-encryption	1m 22s
Test example js-libp2p-example-discovery-mechanisms	1m 23s
Test example js-libp2p-example-circuit-relay	1m 21s
Test example js-libp2p-example-pubsub	1m 15s
Test example js-libp2p-example-pnet	1m 8s
Test example js-libp2p-example-transports	1m 10s
Test example js-libp2p-example-webrtc-private-to-public	1m 57s
Test example js-libp2p-example-webrtc-private-to-private	2m 11s
	24m 23s

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