fix(stack/observability): Replace extraVolumes with extraContainerVolumes

Author: NickLarsenNZ

stacks/observability/grafana.yaml

@@ -66,7 +66,7 @@ options:
     # Mount the certificate generated by the secret-operator
     - name: tls
       mountPath: /etc/grafana/certs/
-  extraVolumes:
+  extraContainerVolumes:
     # Request a TLS certificate from the secret-operator
     - name: tls
       ephemeral: