Use a smaller worker type for the task to generate past bugs by function

infra/data-pipeline.yml

@@ -208,7 +208,7 @@ tasks:
       deadline: {$fromNow: '3 days'}
       expires: {$fromNow: '1 month'}
       provisionerId: proj-relman
-      workerType: compute-small
+      workerType: ci
       dependencies:
         - commit-retrieval
         - bugs-retrieval