fixes: untrusted code (#2598)

# Description


https://github.com/Stirling-Tools/Stirling-PDF/security/code-scanning/151

Closes #(issue_number)

## 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/PR-Demo-Comment.yml

@@ -107,7 +107,9 @@ jobs:
 
       - name: Get version number
         id: versionNumber
-        run: echo "versionNumber=$(./gradlew printVersion --quiet | tail -1)" >> $GITHUB_OUTPUT
+        run: |
+          VERSION=$(grep "^version =" build.gradle | awk -F'"' '{print $2}')
+          echo "versionNumber=$VERSION" >> $GITHUB_OUTPUT
 
       - name: Login to Docker Hub
         uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0