Documentation: Update team policy automation permissions on doc

[RachelElysia]

Fleet version: (head to the "My account" page in the Fleet UI or run fleetctl --version)

Operating system: (e.g. macOS 11.2.3)

Web browser: (e.g. Chrome 88.0.4324)

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🧑‍💻  Expected behavior

https://fleetdm.com/docs/using-fleet/permissions

• Include team permission to create, edit, delete team policy automations

💥  Actual behavior

More info