Fix default k8s snap channel #483

Job	Run time
Build & Run E2E Images	41m 28s
Build & Run E2E Images	41m 28s
Build & Run E2E Images	31m 35s
Run E2E Tests (KCP remediation)	21m 38s
Run E2E Tests (KCP remediation)	18m 36s
Run E2E Tests (KCP remediation)	12m 57s
Run E2E Tests (MachineDeployment remediation)	18m 17s
Run E2E Tests (MachineDeployment remediation)	16m 10s
Run E2E Tests (MachineDeployment remediation)	7m 52s
Run E2E Tests (Workload cluster creation)	15m 42s
Run E2E Tests (Workload cluster creation)	15m 56s
Run E2E Tests (Workload cluster creation)	8m 5s
Run E2E Tests (Workload cluster scaling)	16m 16s
Run E2E Tests (Workload cluster scaling)	15m 11s
Run E2E Tests (Workload cluster scaling)	13m 51s
Run E2E Tests (Workload cluster upgrade)	16m 44s
Run E2E Tests (Workload cluster upgrade)	15m 17s
Run E2E Tests (Workload cluster upgrade)	12m 11s
Run E2E Tests (Certificate Refresh)	16m 47s
Run E2E Tests (Certificate Refresh)	16m 2s
Run E2E Tests (Certificate Refresh)	1h 6m 5s
Run E2E Tests (Orchestrated In place upgrades)	28m 18s
Run E2E Tests (Orchestrated In place upgrades)	26m 17s
Run E2E Tests (Orchestrated In place upgrades)	13m 25s
	8h 26m 8s

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