install cosign v2 from main (#186)

Makes the installer use cosign v2, when install from "main".

Signed-off-by: Ramon Petgrave <[email protected]>

Author: ramonpetgrave64

action.yml

@@ -42,7 +42,7 @@ runs:
         if [[ ${{ inputs.cosign-release }} == "main" ]]; then
           log_info "installing cosign via 'go install' from its main version"
           GOBIN=$(go env GOPATH)/bin
-          go install github.com/sigstore/cosign/cmd/cosign@main
+          go install github.com/sigstore/cosign/v2/cmd/cosign@main
           ln -s $GOBIN/cosign ${{ inputs.install-dir}}/cosign
           exit 0
         fi