add missed "build-args" param

Author: lunarwhite

.tekton/cert-manager-operator-fbc-push.yaml

@@ -29,6 +29,8 @@ spec:
     value: Containerfile.catalog
   - name: path-context
     value: .
+  - name: build-args
+    value: []
   pipelineRef:
     name: fbc-build-pipeline
   taskRunTemplate: