Potential fix for code scanning alert no. 1: Workflow does not contain permissions

[SolutionsRMe]

Potential fix for https://github.com/Solution-Desk/improve/security/code-scanning/1

In general, the fix is to explicitly declare a permissions block so the GITHUB_TOKEN has only the minimal rights required. For this workflow, the job reads repository contents (via actions/checkout) and runs local linting; it does not need any write capabilities or access to other scopes, so contents: read is sufficient.

The best fix without changing existing functionality is to add a permissions block at the job level for the markdown job. This keeps the change tightly scoped and ensures that only this job is affected. In .github/workflows/ci.yml, under jobs: markdown:, insert a permissions: key with contents: read, indented to match the other job properties. No additional imports, methods, or definitions are needed because this is purely a configuration change in the GitHub Actions workflow YAML.

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