The comment has a spelling error. (#6948)

Signed-off-by: Meactor <meactor@outlook.com>

Author: Meactor

website/content/en/docs/building-operators/golang/advanced-topics.md

@@ -85,7 +85,7 @@ import (
     "k8s.io/apimachinery/pkg/runtime/schema"
     "sigs.k8s.io/controller-runtime/pkg/scheme"
     ...
-    // DNSEndoints
+    // DNSEndpoints
     externaldns "github.com/kubernetes-incubator/external-dns/endpoint"
     metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
  )
@@ -518,4 +518,4 @@ Authors may decide to distribute their bundles for various architectures: x86_64
 [PrometheusRule reconciliation example]:https://github.com/operator-framework/operator-sdk/blob/master/testdata/go/v4/monitoring/memcached-operator/internal/controller/memcached_controller.go
 [unit testing documentation]:https://prometheus.io/docs/prometheus/latest/configuration/unit_testing_rules/
 [alerts unit tests]:https://github.com/operator-framework/operator-sdk/tree/master/testdata/go/v4/monitoring/memcached-operator/monitoring/prom-rule-ci
-[kube-prometheus docs]:https://github.com/prometheus-operator/kube-prometheus/blob/main/docs/access-ui.md#prometheus
+[kube-prometheus docs]:https://github.com/prometheus-operator/kube-prometheus/blob/main/docs/access-ui.md#prometheus