chore(deps): update konflux references to 7891800

[red-hat-konflux]

This PR contains the following updates:

Package	Change
quay.io/redhat-appstudio-tekton-catalog/task-buildah	15e48e1 -> 7891800

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[openshift-ci]

Hi @red-hat-konflux[bot]. Thanks for your PR.

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[darkdoc]

/ok-to-test

[darkdoc]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: darkdoc, red-hat-konflux[bot]

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[darkdoc]

/lgtm