[CodeStyle] Address Shellcheck finding 'SC2155 in iso-ca-bundle-config.sh'#2825

gmarciani merged 1 commit intoaws:developaws/aws-parallelcluster-cookbook:developfrom

gmarciani:wip/mgiacomo/3.11.1/shellcheck-fix-1015-1-developgmarciani/aws-parallelcluster-cookbook:wip/mgiacomo/3.11.1/shellcheck-fix-1015-1-developCopy head branch name to clipboard