Update buildah-remote-oci-ta task ref to 0.6

This should fix the following viloation as part of CI:

✕ [Violation] tasks.unsupported
    ImageRef: quay.io/redhat-user-workloads/rhtap-contract-tenant/ec-main/cli-main@sha256:e0bcdf601805fca6bcfe363f000d45f9295a5cd055fa62dac81afc1947f7b6b7
    Reason: Task "buildah-remote-oci-ta" is used by pipeline task "build-container" is or will be unsupported as of
    2025-12-11T00:00:00Z. Upgrade to a newer version of the Task.
    Term: buildah-remote-oci-ta
    Title: Task version unsupported
    Description: The Tekton Task used is or will be unsupported. The Task is annotated with `build.appstudio.redhat.com/expires-on`
    annotation marking it as unsupported after a certain date. To exclude this rule add "tasks.unsupported:buildah-remote-oci-ta" to
    the `exclude` section of the policy configuration.

Author: Acepresso

.tekton/cli-main-pull-request.yaml

@@ -247,7 +247,7 @@ spec:
         - name: name
           value: buildah-remote-oci-ta
         - name: bundle
-          value: quay.io/konflux-ci/tekton-catalog/task-buildah-remote-oci-ta:0.5@sha256:4f348fa6e0b5d7f976ae6cbb75f4e93bc0be1188f074e39bcae3b5fd71796a3f
+          value: quay.io/konflux-ci/tekton-catalog/task-buildah-remote-oci-ta:0.6@sha256:a7b4acd34b9b346d3b866eec5db454c25bf82fea24199ef578cb921f0358f99f
         - name: kind
           value: task
         resolver: bundles

.tekton/cli-main-push.yaml

@@ -249,7 +249,7 @@ spec:
         - name: name
           value: buildah-remote-oci-ta
         - name: bundle
-          value: quay.io/konflux-ci/tekton-catalog/task-buildah-remote-oci-ta:0.5@sha256:4f348fa6e0b5d7f976ae6cbb75f4e93bc0be1188f074e39bcae3b5fd71796a3f
+          value: quay.io/konflux-ci/tekton-catalog/task-buildah-remote-oci-ta:0.6@sha256:a7b4acd34b9b346d3b866eec5db454c25bf82fea24199ef578cb921f0358f99f
         - name: kind
           value: task
         resolver: bundles