[ci] Fix potential github action smells

[ceddy4395]

📌 Checklist before creating the PR

• I have created an issue for this PR for traceability
• The title follows the standard format: [doc/gemini/tensor/...]: A concise description
• I have added relevant tags if possible for us to better distinguish different PRs
• I have installed pre-commit: pip install pre-commit && pre-commit install

🚨 Issue number

Link this PR to your issue with words like fixed to automatically close the linked issue upon merge

e.g. fixed #1234, closed #1234, resolved #1234

fixed: #5667

📝 What does this PR do?

Hey! 🙂
I want to contribute the following changes to your workflow:

• Avoid executing scheduled workflows on forks
• Use 'if' for upload-artifact action
• Use permissions whenever using Github Token

These changes are part of a research Study at TU Delft looking at GitHub Action Smells. Find out more

Summarize your work here.
if you have any plots/diagrams/screenshots/tables, please attach them here.

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• My issue clearly describes the problem/feature/proposal, with diagrams/charts/table/code if possible
• I have performed a self-review of my code
• I have added thorough tests.
• I have added docstrings for all the functions/methods I implemented

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• 🌚 No, I don't.

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