Update README

Author: arybolovlev

README.md

@@ -16,6 +16,7 @@ Kubernetes Operator allows managing HCP Terraform / Terraform Enterprise resourc
 The Operator can manage the following types of resources:
 
 - `AgentPool` manages [HCP Terraform Agent Pools](https://developer.hashicorp.com/terraform/cloud-docs/agents/agent-pools), [HCP Terraform Agent Tokens](https://developer.hashicorp.com/terraform/cloud-docs/users-teams-organizations/api-tokens#agent-api-tokens) and can perform TFC agent scaling
+- `AgentToken` manages [HCP Terraform Agent Tokens](https://developer.hashicorp.com/terraform/cloud-docs/users-teams-organizations/api-tokens#agent-api-tokens)
 - `Module` implements [API-driven Run Workflows](https://developer.hashicorp.com/terraform/cloud-docs/run/api)
 - `Project` manages [HCP Terraform Projects](https://developer.hashicorp.com/terraform/cloud-docs/workspaces/organize-workspaces-with-projects)
 - `Workspace` manages [HCP Terraform Workspaces](https://developer.hashicorp.com/terraform/cloud-docs/workspaces)