Update pull_request_template.md

.github/pull_request_template.md

@@ -1,11 +1,3 @@
----
-name: Pull request template
-about: Create a pull request to contribute to our software
-title: ""
-labels: ""
-assignees: ""
----
-
 ## Pull Request
 
 ### Description
@@ -15,11 +7,14 @@ assignees: ""
 Issues:
 
 ### Definition of Done
+*Advice: Unchecked checkboxes are not accepted by the build pipeline. Cross out any non-relevant item by using '~~'.*
+
 - [ ] Acceptance criteria are met
 - [ ] Build/Test workflow has successfully finished
 - [ ] Release notes are complemented
 - [ ] Documentation is complemented (operator manual, system specification)
 - [ ] Frontend is locally smoke-tested
-- [ ] Side branches are deleted
 - [ ] Board is updated
-- [ ] Infrastructure is adjusted
+- [ ] Infrastructure is adjusted
+
+Please delete all side branches after merging.