Update ordered-processing.yaml

Author: vaibhavtiwari33

test/e2e/testdata/ordered-processing.yaml

@@ -22,7 +22,7 @@ spec:
       sink:
         udsink:
           container:
-            image: quay.io/numaio/numaflow-rs/redis-sink:test
+            image: quay.io/numaio/numaflow-rs/redis-sink:stable
             imagePullPolicy: IfNotPresent
             env:
               - name: SINK_HASH_KEY