update prometheus dependencies (#5520)

Signed-off-by: junot <junotxiang@kubesphere.io>

vendor/github.com/prometheus-community/prom-label-proxy/injectproxy/alerts.go

@@ -0,0 +1,25 @@
+// Copyright 2020 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package injectproxy
+
+import "net/http"
+
+func (r *routes) alerts(w http.ResponseWriter, req *http.Request) {
+	switch req.Method {
+	case "GET":
+		r.enforceFilterParameter(w, req)
+	default:
+		http.NotFound(w, req)
+	}
+}