docs: fix wrong doc on FundingTransactionFailed #1392

Job	Run time
e2e test for 3-nodes-transfer --env test	11m 19s
e2e test for invoice-ops --env test	10m 46s
e2e test for open-use-close-a-channel --env test	10m 40s
e2e test for udt --env test	10m 42s
e2e test for reestablish --env test	11m 5s
e2e test for cross-chain-hub --env test	10m 47s
e2e test for router-pay --env test	11m 40s
e2e test for udt-router-pay --env test	10m 54s
e2e test for udt --env xudt-test	10m 52s
e2e test for 3-nodes-transfer --env test --env-var HASH_ALGORITHM=sha256	11m 4s
	1h 49m 49s

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