[release/v2.7.x] Pin cosign to v2.6.1#5595

matheuscscp merged 1 commit intorelease/v2.7.xfluxcd/flux2:release/v2.7.xfrom

backport-5594-to-release/v2.7.xfluxcd/flux2:backport-5594-to-release/v2.7.xCopy head branch name to clipboard