deps: update custom-router to iroh 0.97 #420

Job	Run time
Prepare dependencies	27s
Format check	8s
WASM build	2m 24s
Test dumbpipe-web	23s
Test custom-router	30s
Test browser-chat	1m 26s
Test iroh-automerge-repo	24s
Test browser-echo	31s
Test frosty	41s
Test framed-messages	48s
Test browser-chat/cli	1m 51s
Test extism/plugin	15s
Test extism/iroh-extism-host-functions	52s
Test iroh-gateway	35s
Test iroh-automerge	32s
Test extism/host	28s
	12m 15s

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