Specified default permissions for move-closed-issues.yaml

[egcuriel]

Fixes #8584

What changes did you make?

• Added a top-level permissions: block to the .github/workflows/move-closed-issues.yaml file
• Set the default contents permission to read

Why did you make the changes (we will use this info to test)?

• To align the workflow with GitHub security recommendations by explicitly defining minimum required permissions
• To minimize unnecessary privileges by restricting default repository access

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Screenshots of Proposed Changes To The Website (if any, please do not include screenshots of code changes)

• No visual changes

Test Log

• https://gist.github.com/egcuriel/edf606ea59d592e1bbca42756076fa70

[github-actions]

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From your project repository, check out a new branch and test the changes.

git checkout -b egcuriel-8584-specify-default-permissions gh-pages
git pull https://github.com/egcuriel/website.git 8584-specify-default-permissions