Update cloud-linode.md

[jdeighton]

Update list of required permissions on the Linode Personal Access Token.

Added StackScripts read/write as a required permission on the Personal Access Token.

Description

Updated documentation for Linode to ensure correct permissions are set on the Personal Access Token.

Motivation and Context

If a Personal Access Token is created with just Linodes read/write permission, the Linode API will reject it with a 401: Your OAuth token is not authorized to use this endpoint. in the task: cloud-linode : Create a stackscript.

How Has This Been Tested?

1. Create a Linode Personal Access Token that only has Linodes read/write permission.
2. Run ./algo script to deploy server (selecting Linode as the provider and following remaining steps).
3. Observe 401 error from Linode API.
4. Create new Linode Personal Access Token with both Linodes and StackScripts read/write permissions
5. Re-run ./algo script to deploy server (again, selecting Linode as the provider and answering remaining questions)
6. Server is succesfully deployed.

Types of changes

• Documentation update

Checklist:

• I have read the CONTRIBUTING document.
• [] My code follows the code style of this project.
• [] My change requires a change to the documentation.
• I have updated the documentation accordingly.
• [] I have added tests to cover my changes.
• [] All new and existing tests passed.

[CLAassistant]

All committers have signed the CLA.

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