Fix issue reported by pylint #243

Namespace: <a href="https://detailurl.setting.custom-console-url-namespace.is.not.configured" rel="nofollow">konflux-sec-eng-spec-tenant
PipelineRun: <a href="https://console.redhat.com/application-pipeline/ns/konflux-sec-eng-spec-tenant/pipelinerun/nbde-tang-server-multiarch-bundle-on-pull-request-sh2bl" rel="nofollow">nbde-tang-server-multiarch-bundle-on-pull-request-sh2bl

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Red Hat Konflux/nbde-tang-server-multiarch-bundle-on-pull-request has successfully validated your commit.

Status	Duration	Name
✅ Succeeded	8 seconds	init
✅ Succeeded	16 seconds	clone-repository
✅ Succeeded	11 seconds	prefetch-dependencies
✅ Succeeded	2 minutes	build-container
✅ Succeeded	4 seconds	build-image-index
✅ Succeeded	33 seconds	clamav-scan
✅ Succeeded	16 seconds	rpms-signature-scan
✅ Succeeded	22 seconds	clair-scan
✅ Succeeded	7 seconds	deprecated-base-image-check
✅ Succeeded	7 seconds	apply-tags
✅ Succeeded	16 seconds	sast-snyk-check
✅ Succeeded	11 seconds	push-dockerfile
✅ Succeeded	43 seconds	build-source-image
✅ Succeeded	8 seconds	ecosystem-cert-preflight-checks
✅ Succeeded	7 seconds	show-sbom