Bump cosign to v2.4.1 #645

Job	Run time
check-docs	4s
lint-chart	23s
Build matrix	3s
Test (v1.21.14, default)	21s
Test (v1.21.14, spire-controller-manager)	27s
Test (v1.21.14, spire-oidc-insecure)	23s
Test (v1.21.14, upstream-authority-disk)	30s
Test (v1.22.15, default)	28s
Test (v1.22.15, spire-controller-manager)	23s
Test (v1.22.15, spire-oidc-insecure)	22s
Test (v1.22.15, upstream-authority-disk)	36s
Test (v1.23.13, default)	22s
Test (v1.23.13, spire-controller-manager)	29s
Test (v1.23.13, spire-oidc-insecure)	23s
Test (v1.23.13, upstream-authority-disk)	29s
Test (v1.24.7, default)	21s
Test (v1.24.7, spire-controller-manager)	41s
Test (v1.24.7, spire-oidc-insecure)	27s
Test (v1.24.7, upstream-authority-disk)	21s
Test (v1.25.3, default)	26s
Test (v1.25.3, spire-controller-manager)	36s
Test (v1.25.3, spire-oidc-insecure)	35s
Test (v1.25.3, upstream-authority-disk)	24s
	9m 34s

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