[CTFE] Change datastore project to skia-public

Bug: skia:8759
Change-Id: Ifb6eb5ad56ec2f6b4ffe5d57056905898efab529
diff --git a/ctfe.yaml b/ctfe.yaml
index 49d5615..efdc348 100644
--- a/ctfe.yaml
+++ b/ctfe.yaml
@@ -43,6 +43,7 @@
           image: gcr.io/skia-public/ctfe:2019-01-17T14_52_17Z-rmistry-ce8f906-clean
           args:
             - "--namespace=cluster-telemetry"
+            - "--project_name=skia-public"
             - "--host=ct.skia.org"
             - "--logtostderr"
             - "--port=:8000"