[bot:main] update konflux configuration

Generated by workflow [Generate konflux configurations](https://github.com/openshift-pipelines/hack/actions/runs/24187877899)
Triggered by divyansh42

Author: openshift-pipelines-bot

.github/renovate.json

@@ -5,6 +5,7 @@
   ],
   "enabledManagers": [
     "tekton",
+    "dockerfile",
     "rpm-lockfile"
   ],
   "schedule": ["* * * * 0,6"],