[maintenance] Setup GitHub automation permissions for openms-docs

[tapaswenipathak]

To set up automation on GitHub, i think these should be sufficient.

1. replace/tapaswenipathak/openms
2. log retention days: 7 days
3. code security and analysis: enable all.

(i don't have auth(s) so i see this)

[timosachsenberg]

Do I need to enable Dependabot version updates?
not sure what I should put in the yml

[tapaswenipathak]

Do I need to enable Dependabot version updates?

yes, it should be silent rn.

not sure what I should put in the yml

a .yml required!? skip that part.

[tapaswenipathak]

Action permissions should be: Allow all actions and reusable workflows.
(i understood it wrong.)

https://github.com/OpenMS/OpenMS-docs/actions/runs/2555061839

Ref: #114.

cc @greengypsy.

[jpfeuffer]

The settings described above are not correct.
https://github.bokerqi.topmunity/t/workflow-error-action-not-allowed/16788

This is the issue. Are you sure you want those uncertified actions? Is there no alternative?