Add empty line at end of config

Author: Allan King

.github/ISSUE_TEMPLATE/config.yml

@@ -4,4 +4,5 @@ contact_links:
     url: https://technologyenhancedlearning.github.io/tel-frontend/
     about: The TEL Design system is based on the NHS Design System.
   - name: NHS Service manual
-    url: https://service-manual.nhs.uk/
+    url: https://service-manual.nhs.uk/
+