fix: guard processSendQueue against non-writable stream status #5282

Job	Run time
Build	3m 20s
Test example js-libp2p-example-chat	1m 9s
Test example js-libp2p-example-custom-protocols	1m 28s
Test example js-libp2p-example-transports	1m 36s
Test example js-libp2p-example-pubsub	1m 7s
Test example js-libp2p-example-browser-pubsub	1m 51s
Test example js-libp2p-example-circuit-relay	1m 7s
Test example js-libp2p-example-delegated-routing	2m 10s
Test example js-libp2p-example-discovery-mechanisms	34m 20s
Test example js-libp2p-example-pnet	1m 5s
Test example js-libp2p-example-connection-encryption	58s
Test example js-libp2p-example-webrtc-private-to-private	1m 51s
Test example js-libp2p-example-protocol-and-stream-muxing	56m 16s
Test example js-libp2p-example-peer-and-content-routing	1m 18s
Test example js-libp2p-example-webrtc-private-to-public	1m 52s
	1h 51m 28s

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