Bump github.com/containerd/containerd from 1.6.18 to 1.6.26 #2536

Job	Run time
Basic Checks	3m 14s
Basic Checks	3m 14s
Unit Tests	6m 12s
Unit Tests	8m 43s
Integration Tests (raft)	12m 45s
Integration Tests (raft)	11m 22s
Integration Tests (pvtdata)	11m 12s
Integration Tests (pvtdata)	11m 12s
Integration Tests (pvtdatapurge)	4m 52s
Integration Tests (pvtdatapurge)	4m 52s
Integration Tests (ledger)	12m 40s
Integration Tests (ledger)	12m 40s
Integration Tests (lifecycle)	7m 19s
Integration Tests (lifecycle)	7m 19s
Integration Tests (e2e smartbft)	21m 9s
Integration Tests (e2e smartbft)	21m 7s
Integration Tests (discovery gossip devmode pluggable)	6m 45s
Integration Tests (discovery gossip devmode pluggable)	6m 45s
Integration Tests (gateway idemix pkcs11 configtx configtxlator)	18m 8s
Integration Tests (gateway idemix pkcs11 configtx configtxlator)	18m 8s
Integration Tests (sbe nwo msp)	10m 37s
Integration Tests (sbe nwo msp)	10m 37s
	3h 50m 52s

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