[BUG] Github Actions: set top-level permissions

[psilva-veeam]

Describe the bug

Set top-level permissions for Github Actions to contents: read. If needed, individual jobs can still get higher permissions.

https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#permissions

To Reproduce

Dependabot status

Expected behavior

Top-level permissions for Github Actions set to contents: read resulting in no issues from Dependabot

Screenshots

Environment

Github Actions

Additional context

kastenhq/kubestr#242

[github-actions]

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