Fix: Thymeleaf syntax (/*[[...]]*/) (#2659)

# Description

Please provide a summary of the changes, including relevant motivation
and context.

Closes #(issue_number)

## Checklist

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] 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/)
- [x] 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)

src/main/resources/templates/fragments/footer.html

@@ -16,8 +16,8 @@
 
     <!-- powered by section -->
     <div class="footer-powered-by">
-	  <span th:text="#{poweredBy}"></span>
-	  <a href="https://stirlingpdf.com" class="stirling-link">Stirling PDF</a>
-	</div>
+      <span th:text="#{poweredBy}"></span>
+      <a href="https://stirlingpdf.com" class="stirling-link">Stirling PDF</a>
+    </div>
   </div>
 </footer>