Fix: Pinned-Dependencies sync_files.yml (#2660)

# Description

https://github.com/Stirling-Tools/Stirling-PDF/security/code-scanning/58

## Checklist

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have performed a self-review of my own code
- [ ] I have attached images of the change if it is UI based
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] If my code has heavily changed functionality I have updated
relevant docs on [Stirling-PDFs doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
- [ ] My changes generate no new warnings
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

.github/workflows/sync_files.yml

@@ -30,7 +30,7 @@ jobs:
         with:
           python-version: "3.12"
       - name: Install dependencies
-        run: pip install tomlkit
+        run: pip install --require-hashes -r ./.github/scripts/requirements_sync_readme.txt
       - name: Sync README
         run: python scripts/counter_translation.py
       - name: Set up git config