Merge pull request #2231 from prometheus-operator/pin-pyrra

Pin Pyrra to 0.6.4

scripts/generate-versions.sh

@@ -66,6 +66,6 @@ cat <<-EOF
   "prometheusOperator": "$(get_version "prometheus-operator/prometheus-operator")",
   "kubeRbacProxy": "$(get_version "brancz/kube-rbac-proxy")",
   "configmapReload": "$(get_version "jimmidyson/configmap-reload")",
-  "pyrra": "$(get_version "pyrra-dev/pyrra")"
+  "pyrra": "0.6.4"
 }
 EOF