add upstream repo

Author: aThorp96

.tekton/tektoncd-pipeline-next-controller-pull-request.yaml

@@ -26,6 +26,8 @@ spec:
   params:
   - name: git-url
     value: '{{source_url}}'
+  - name: upstream-git-url
+    value: 'https://github.com/tektoncd/pipeline'
   - name: revision
     value: '{{revision}}'
   - name: output-image