Update Konflux references (release-v1.15)

[red-hat-konflux]

This PR contains the following updates:

Package	Change
quay.io/konflux-ci/tekton-catalog/task-buildah-remote-oci-ta	e312ca9 -> 7fd79c7
quay.io/konflux-ci/tekton-catalog/task-rpms-signature-scan	e6a5aa0 -> 0c9667f

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[openshift-ci]

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

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[openshift-ci]

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