fix(ci): fix cosign image signing

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Errors	Elapsed time
✅ ACTION	actionlint	1	0	0.12s
✅ EDITORCONFIG	editorconfig-checker	1	0	0.03s
✅ REPOSITORY	checkov	yes	no	16.94s
✅ REPOSITORY	gitleaks	yes	no	1.02s
✅ REPOSITORY	git_diff	yes	no	0.01s
✅ REPOSITORY	secretlint	yes	no	2.59s
✅ REPOSITORY	syft	yes	no	1.48s
✅ REPOSITORY	trivy	yes	no	6.69s
✅ YAML	prettier	1	0	0.57s
✅ YAML	v8r	1	0	2.73s
✅ YAML	yamllint	1	0	0.33s

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