test: mark test-inspector-network-fetch as flaky again

test: mark test-inspector-network-fetch as flaky again · nodejs/node@1f6c335

Original file line number	Diff line number	Diff line change
`@@ -20,6 +20,8 @@ test-fs-read-stream-concurrent-reads: PASS, FLAKY`
`20`	`20`	`test-snapshot-incompatible: SKIP`
`21`	`21`
`22`	`22`	`[$system==win32]`
	`23`	`+# https://github.com/nodejs/node/issues/59090`
	`24`	`+test-inspector-network-fetch: PASS, FLAKY`
`23`	`25`	`# https://github.com/nodejs/node/issues/54808`
`24`	`26`	`test-async-context-frame: PASS, FLAKY`
`25`	`27`	`# https://github.com/nodejs/node/issues/54534`