Fixed the url links (grafana#5850)

Backticks should be used inside the link text, to properly be displayed as inline code style, while still preserving the url link.

docs/sources/operator/helm-getting-started.md

@@ -20,8 +20,8 @@ In this guide, you'll learn how to deploy [Grafana Agent Operator]({{< relref ".
 To deploy Agent Operator with Helm, make sure that you have the following:
 
 - A Kubernetes cluster
-- The `[kubectl](https://kubernetes.io/docs/tasks/tools/#kubectl)` command-line client installed and configured on your machine
-- The `[helm](https://helm.sh/docs/intro/install/)` command-line client installed and configured on your machine
+- The [`kubectl`](https://kubernetes.io/docs/tasks/tools/#kubectl) command-line client installed and configured on your machine
+- The [`helm`](https://helm.sh/docs/intro/install/) command-line client installed and configured on your machine
 
 > **Note:** Agent Operator is currently in beta and its custom resources are subject to change.