Add default permissions to "Schedule Monthly" and "WR Schedule Monthly" workflows

[t-will-gillis]

Fixes #8591

What changes did you make?

• Specified the minimum required permissions for the "Schedule Monthly" and "WR Schedule Monthly" workflow YML files via a top-level permissions: block

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

• To align with GitHub security best practices and ensure that workflows have only the minimum needed permissions by default

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

• No visual changes to website
• test log schedule-monthly.yml
• test log wr-schedule-monthly.yml

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

git checkout -b t-will-gillis-spec-default-permissions-8591 gh-pages
git pull https://github.com/t-will-gillis/website.git spec-default-permissions-8591

[t-will-gillis]

• Note: Rolling these changes into PR Bug fixes to "Schedule Monthly" and "WR Schedule Monthly" workflows #8610