chore(ci): downgrade cosign to v2.6.1 due to goreleaser incompatibility #2067

Job	Run time
Tests	1m 49s
Shellcheck	6s
Security Audits	14s
Lints	48s
Test Release Process	1m 17s
goreleaser	0s
binary-provenance	0s
image-provenance	0s
verification-with-cosign	0s
verification-with-slsa-verifier	0s
	4m 14s

Provide feedback