Update pull_request_template.md

.github/pull_request_template.md

@@ -8,6 +8,7 @@ Closes #(issue_number)
 
 - [ ] 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
 - [ ] 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)