chore(KONFLUX-6210): fix and set name and cpe label for tektoncd-triggers-1-15-webhook

For https://issues.redhat.com/browse/KONFLUX-6210, clair needs access to a name and cpe label that it can use to look up the image in VEX statements.

See also release-engineering/rhtap-ec-policy#149

Signed-off-by: Ralph Bean <[email protected]>
Assisted-by: Gemini

Author: ralphbean

.konflux/dockerfiles/webhook.Dockerfile

@@ -26,6 +26,7 @@ LABEL \
       com.redhat.component="openshift-pipelines-triggers-webhook-rhel8-container" \
       name="openshift-pipelines/pipelines-triggers-webhook-rhel8" \
       version=$VERSION \
+      cpe="cpe:/a:redhat:openshift_pipelines:1.15::el8" \
       summary="Red Hat OpenShift Pipelines Triggers Webhook" \
       maintainer="[email protected]" \
       description="Red Hat OpenShift Pipelines Triggers Webhook" \