Fix staging ExternalSecret for cluster-as-a-service (#4235)

Signed-off-by: Alex Misstear <[email protected]>

Author: amisstea

components/cluster-as-a-service/staging/external-secrets.yaml

@@ -23,7 +23,7 @@ spec:
       data:
         aws_access_key_id: "{{ .aws_access_key_id }}"
         aws_secret_access_key: "{{ .aws_secret_access_key }}"
-        pullSecret: "{{ ocp_pull_secret }}"
+        pullSecret: "{{ .ocp_pull_secret }}"
         baseDomain: stage.konfluxeaas.com
         ssh-privatekey: unused
         ssh-publickey: unused