Bump actions/checkout from 3.6.0 to 4.0.0 (#143) #319

Job	Run time
Install Cosign v0.6.0 and test presence in path with pre installed libpcsclite1 package (ubuntu-l...	28s
Install Cosign v0.6.0 and test presence in path (macos-latest)	18s
Install Cosign v0.6.0 and test presence in path (ubuntu-latest)	17s
Install Cosign v0.6.0 and test presence in path (windows-latest)	20s
Install Cosign and test presence in path (macos-latest)	9s
Install Cosign and test presence in path (ubuntu-latest)	5s
Install Cosign and test presence in path (windows-latest)	21s
Install Custom Cosign and test presence in path (macos-latest)	14s
Install Custom Cosign and test presence in path (ubuntu-latest)	10s
Install Custom Cosign and test presence in path (windows-latest)	27s
Install Custom Cosign and test presence in path (macos-latest)	11s
Install Custom Cosign and test presence in path (ubuntu-latest)	5s
Install Custom Cosign and test presence in path (windows-latest)	15s
Install Custom Cosign and test presence in path with custom root dir (ubuntu-latest)	9s
Try to install a wrong Cosign (macos-latest)	51s
Try to install a wrong Cosign (ubuntu-latest)	4s
Try to install a wrong Cosign (windows-latest)	13s
Try to install cosign with go 1.19	4m 0s
Try to install cosign with go 1.20	3m 12s
Try to install cosign with go 1.19	2m 38s
Try to install cosign with go 1.20	2m 37s
Try to install cosign with go 1.19	7m 56s
Try to install cosign with go 1.20	8m 28s
Install existing release of Cosign and test presence in path (ubuntu-latest)	11s
	33m 39s

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