Fix signing containers

[metalmatze]

https://github.com/parca-dev/parca-load/actions/runs/8892039868/workflow#L141-L148

Retrieving signed certificate...

        Note that there may be personally identifiable information associated with this signed artifact.
        This may include the email address associated with the account with which you authenticate.
        This information will be used for signing this artifact and will be stored in public transparency logs and cannot be removed later.
Error: signing [ghcr.io/parca-dev/parca-load@sha256:b2eff91f7e91bed8f0f7803afc0e61edfcaa1f885bcd468b4548d8f9e8f8838d]: getting signer: getting key from Fulcio: verifying SCT: updating local metadata and targets: error updating to TUF remote mirror: invalid key
remote status:{
	"mirror": "https://sigstore-tuf-root.storage.googleapis.com",
	"metadata": {
		"root.json": {
			"version": 9,
			"len": 6766,
			"expiration": "12 Sep 24 06:53 UTC",
			"error": ""
		},
		"snapshot.json": {
			"version": 1[37](https://github.com/parca-dev/parca-load/actions/runs/8892039868/job/24415432716#step:12:38),
			"len": 2302,
			"expiration": "14 May 24 16:06 UTC",
			"error": ""
		},
		"targets.json": {
			"version": 9,
			"len": 5478,
			"expiration": "12 Sep 24 06:13 UTC",
			"error": ""
		},
		"timestamp.json": {
			"version": 180,
			"len": 721,
			"expiration": "03 May 24 16:05 UTC",
			"error": ""
		}
	}
}
main.go:62: error during command execution: signing [ghcr.io/parca-dev/parca-load@sha256:b2eff91f7e91bed8f0f7803afc0e61edfcaa1f885bcd468b4548d8f9e8f88[38](https://github.com/parca-dev/parca-load/actions/runs/8892039868/job/24415432716#step:12:39)d]: getting signer: getting key from Fulcio: verifying SCT: updating local metadata and targets: error updating to TUF remote mirror: invalid key
remote status:{
	"mirror": "https://sigstore-tuf-root.storage.googleapis.com/",
	"metadata": {
		"root.json": {
			"version": 9,
			"len": 6766,
			"expiration": "12 Sep 24 06:53 UTC",
			"error": ""
		},
		"snapshot.json": {
			"version": 137,
			"len": 2302,
			"expiration": "14 May 24 16:06 UTC",
			"error": ""
		},
		"targets.json": {
			"version": 9,
			"len": 5[47](https://github.com/parca-dev/parca-load/actions/runs/8892039868/job/24415432716#step:12:48)8,
			"expiration": "12 Sep 24 06:13 UTC",
			"error": ""
		},
		"timestamp.json": {
			"version": 180,
			"len": 721,
			"expiration": "03 May 24 16:05 UTC",
			"error": ""
		}
	}
}
Error: Process completed with exit code 1.