Updated line 167(PriorityLevelConfigurations) and 170(FlowSchemas) for correct api reference.

Edit line 167 api reference for PriorityLevelConfigurations from 
https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.18/#prioritylevelconfiguration-v1alpha1-flowcontrol
to
https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.18/#prioritylevelconfiguration-v1alpha1-flowcontrol-apiserver-k8s-io
Edit line 170 api reference for FlowSchemas from 
https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.18/#flowschema-v1alpha1-flowcontrol
to
https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.18/#flowschema-v1alpha1-flowcontrol-apiserver-k8s-io

Author: Heena-PyCloud

content/en/docs/concepts/cluster-administration/flow-control.md

@@ -164,10 +164,10 @@ are built in and may not be overwritten:
 
 ## Resources
 The flow control API involves two kinds of resources.
-[PriorityLevelConfigurations](/docs/reference/generated/kubernetes-api/{{< param "version" >}}/#prioritylevelconfiguration-v1alpha1-flowcontrol) 
+[PriorityLevelConfigurations](/docs/reference/generated/kubernetes-api/{{< param "version" >}}/#prioritylevelconfiguration-v1alpha1-flowcontrol-apiserver-k8s-io) 
 define the available isolation classes, the share of the available concurrency
 budget that each can handle, and allow for fine-tuning queuing behavior.
-[FlowSchemas](/docs/reference/generated/kubernetes-api/{{< param "version" >}}/#flowschema-v1alpha1-flowcontrol)
+[FlowSchemas](/docs/reference/generated/kubernetes-api/{{< param "version" >}}/#flowschema-v1alpha1-flowcontrol-apiserver-k8s-io)
 are used to classify individual inbound requests, matching each to a single
 PriorityLevelConfiguration.