[bot:release-v1.15.x] Update v4.12 generate catalog

Author: openshift-pipelines-bot

.konflux/olm-catalog/index/v4.12/catalog-template.json

@@ -382,7 +382,7 @@
     {
       "schema": "olm.bundle",
       "name": "openshift-pipelines-operator-rh.v1.15.3",
-      "image": "quay.io/openshift-pipeline/pipelines-operator-bundle@sha256:ab95040a88401d189fe0bc11fa6b280020729832288bbcc2f4eac6d976593229"
+      "image": "quay.io/openshift-pipeline/pipelines-operator-bundle@sha256:a881619c1fda3b5db2bbaa402a5384425310ddf23f12cecccd31adf6d534d364"
     }
   ]
 }