Update _index.md

Author: cswatt

content/en/agent/kubernetes/_index.md

@@ -254,14 +254,14 @@ Here are the steps:
  helm install my-datadog-operator datadog/datadog-operator
  ```
 
-2. Create a Kubernetes secret with your API and APP keys
+2. Create a Kubernetes secret with your API and app keys
 
  ```shell
  kubectl create secret generic datadog-secret --from-literal api-key=<DATADOG_API_KEY> --from-literal app-key=<DATADOG_APP_KEY>
  ```
  Replace `<DATADOG_API_KEY>` and `<DATADOG_APP_KEY>` with your [Datadog API and application keys][6]
 
-2. Create a file with the spec of your DatadogAgent deployment configuration. The simplest configuration is:
+2. Create a file with the spec of your Datadog Agent deployment configuration. The simplest configuration is:
 
  ```yaml
  apiVersion: datadoghq.com/v1alpha1
@@ -284,7 +284,7 @@ Here are the steps:
  name: "gcr.io/datadoghq/cluster-agent:latest"
  ```
 
-3. Deploy the Datadog agent with the above configuration file:
+3. Deploy the Datadog Agent with the above configuration file:
  ```shell
  kubectl apply -f agent_spec=/path/to/your/datadog-agent.yaml
  ```