Fix error message for no platform on fix #14619

Namespace: <a href="https://konflux-ui.apps.kflux-prd-rh02.0fk9.p1.openshiftapps.com/ns/ocp-isc-tenant" rel="nofollow">ocp-isc-tenant
PipelineRun: <a href="https://konflux-ui.apps.kflux-prd-rh02.0fk9.p1.openshiftapps.com/ns/ocp-isc-tenant/pipelinerun/compliance-operator-content-dev-on-pull-request-dm7kv" rel="nofollow">compliance-operator-content-dev-on-pull-request-dm7kv

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Status	Duration	Name
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🟢 Succeeded	24 seconds	clone-repository
🟢 Succeeded	57 seconds	prefetch-dependencies
🟢 Succeeded	4 minutes	build-images
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🟢 Succeeded	24 seconds	clair-scan
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🟢 Succeeded	6 seconds	coverity-availability-check
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🟢 Succeeded	35 seconds	ecosystem-cert-preflight-checks
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🟢 Succeeded	32 seconds	sast-shell-check
🟢 Succeeded	32 seconds	sast-unicode-check
🟢 Succeeded	13 minutes	sast-coverity-check
🟢 Succeeded	9 seconds	show-sbom