deps: bump undici from 6.21.0 to 7.0.0 in /packages/gateway-conformance #427

Job	Run time
js-test-and-release / check	2m 34s
js-test-and-release / test-node (windows-latest, lts/*)	2m 31s
js-test-and-release / test-firefox	52s
js-test-and-release / test-node (ubuntu-latest, lts/*)	40s
js-test-and-release / test-chrome	57s
js-test-and-release / test-node (macos-latest, lts/*)	2m 0s
js-test-and-release / test-chrome-webworker	57s
js-test-and-release / test-electron-main	49s
js-test-and-release / test-firefox-webworker	45s
js-test-and-release / test-webkit (ubuntu-latest, lts/*)	56s
js-test-and-release / test-webkit-webworker (ubuntu-latest, lts/*)	1m 12s
js-test-and-release / test-webkit (macos-latest, lts/*)	2m 5s
js-test-and-release / test-webkit-webworker (macos-latest, lts/*)	1m 49s
js-test-and-release / test-electron-renderer	36s
js-test-and-release / release-check	0s
js-test-and-release / release	0s
	18m 43s

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