Update pull_request_template.md

Author: bear-is-asleep

.github/pull_request_template.md

@@ -1,9 +1,19 @@
-### Description 
-Please provide a detailed description of the changes this pull request introduces. If available, also link to a docdb link where the issue/change have been presented on/discussed.
-
-- [X] Have you added a label? (bug/enhancement/physics etc.)
-- [X] Have you assigned at least 1 reviewer?
-- [X] Is this PR related to an open issue / project?
-- [X] Does this PR affect CAF data format? If so, please assign a CAF maintainer as additional reviewer.
-- [X] Does this PR require merging another PR in a different repository (such as sbnanobj/sbnobj etc.)? If so, please link it in the description.
-- [X] Are you submitting this PR on behalf of someone else who made the code changes? If so, please mention them in the description.
+## Description 
+Please provide a detailed description of the changes this pull request introduces. 
+
+## Checklist
+- [ ] Added at least 1 label from [available labels](https://github.com/SBNSoftware/sbndcode/issues/labels?sort=name-asc).
+- [ ] Assigned at least 1 reviewer under `Reviewers`,
+- [ ] Assigned all contributers including yourself under `Assignees` ,
+- [ ] Does this PR affect CAF data format? If so, please assign a CAF maintainer as additional reviewer.
+- [ ] Does this affect the standard workflow? 
+
+### Relevant issue link(s) (optional)
+Is there existing issue that this PR addresses?
+
+### Relevant PR links (optional)
+Does this PR require merging another PR in a different repository (such as sbnanobj/sbnobj etc.)?
+
+### Link(s) to docdb describing changes (optional)
+Is there a docdb describing the issue this solves or the feature added?
+