fix: correct arg type of cluster object #423
Summary
Build failed.
https://ci.atmosphere.dev/t/atmosphere/buildset/2fff30496c524f47b70b77975db8ac39
❌ magnum-cluster-api-sonobuoy-flatcar-v1.27.15-calico FAILURE in 31m 11s (non-voting)
❌ magnum-cluster-api-sonobuoy-flatcar-v1.27.15-cilium FAILURE in 28m 53s (non-voting)
❌ magnum-cluster-api-sonobuoy-rockylinux-8-v1.27.15-calico FAILURE in 29m 33s (non-voting)
❌ magnum-cluster-api-sonobuoy-rockylinux-8-v1.27.15-cilium FAILURE in 29m 14s (non-voting)
❌ magnum-cluster-api-sonobuoy-rockylinux-9-v1.27.15-calico FAILURE in 29m 03s (non-voting)
❌ magnum-cluster-api-sonobuoy-rockylinux-9-v1.27.15-cilium FAILURE in 28m 34s (non-voting)
❌ magnum-cluster-api-sonobuoy-ubuntu-2204-v1.27.15-calico FAILURE in 31m 02s
❌ magnum-cluster-api-sonobuoy-ubuntu-2204-v1.27.15-cilium FAILURE in 31m 11s
❌ magnum-cluster-api-sonobuoy-ubuntu-2204-v1.28.11-calico FAILURE in 30m 18s
❌ magnum-cluster-api-sonobuoy-ubuntu-2204-v1.28.11-cilium FAILURE in 30m 25s
❌ magnum-cluster-api-sonobuoy-ubuntu-2204-v1.29.6-calico FAILURE in 31m 20s
❌ magnum-cluster-api-sonobuoy-ubuntu-2204-v1.29.6-cilium FAILURE in 30m 35s
❌ magnum-cluster-api-sonobuoy-ubuntu-2204-v1.30.2-calico FAILURE in 32m 12s
❌ magnum-cluster-api-sonobuoy-ubuntu-2204-v1.30.2-cilium FAILURE in 34m 10s
✔️ magnum-cluster-api-linters SUCCESS in 4m 36s
✔️ magnum-cluster-api-unit SUCCESS in 3m 47s
✔️ magnum-cluster-api-functional SUCCESS in 6m 34s